*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button,input,textarea,select{font:inherit}
.container{max-width:1280px;margin:0 auto;padding:0 24px}
.page{padding:20px 0 36px}
.page__title{font-size:clamp(1.5rem,3vw,2rem);margin-bottom:8px}
.page__sub{color:var(--muted);margin-bottom:28px}
.page--narrow{max-width:480px;margin-left:auto;margin-right:auto}
.breadcrumb{margin-bottom:20px;font-size:.85rem;color:var(--muted)}
.section__title{font-size:1.2rem;margin:32px 0 20px}
.empty-state{color:var(--muted);padding:40px;text-align:center}

.header{position:sticky;top:0;z-index:100;background:var(--surface);border-bottom:1px solid var(--border);transition:box-shadow .3s}
.header--scrolled{box-shadow:var(--shadow)}
.header__inner{max-width:1280px;margin:0 auto;padding:0 24px;height:60px;display:flex;align-items:center;gap:16px}
.logo{font-size:1.05rem;flex-shrink:0;font-weight:700}
.nav{display:flex;gap:2px;margin-left:auto;flex-wrap:wrap}
.nav a{font-size:.76rem;padding:8px 10px;border-radius:var(--radius);color:var(--muted);white-space:nowrap}
.nav a.is-active,.nav a:hover{color:var(--primary);background:rgba(255,255,255,.06)}
.header__actions{display:flex;align-items:center;gap:10px;margin-left:8px;flex-shrink:0}
.header__user{font-size:.82rem;color:var(--muted)}
.nav-toggle{display:none;background:none;border:none;cursor:pointer}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--text);margin:4px 0}

.hero{position:relative;min-height:360px;display:flex;align-items:center;overflow:hidden}
.hero__bg{position:absolute;inset:0}
.hero__bg img{width:100%;height:100%;object-fit:cover}
.hero__overlay{position:absolute;inset:0}
.hero__content{position:relative;z-index:2;padding:48px 24px;max-width:1140px;margin:0 auto;width:100%}
.hero__tag{font-size:.72rem;letter-spacing:.15em;margin-bottom:8px}
.hero__content h1{font-size:clamp(1.8rem,4vw,2.8rem);margin-bottom:12px}
.hero__desc{max-width:520px;line-height:1.7;margin-bottom:20px}

.stats-bar{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--border);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;margin-bottom:28px}
.stat-item{background:var(--surface);padding:20px 16px;text-align:center}
.stat-item__num{display:block;font-size:clamp(1.1rem,2.5vw,1.6rem);font-weight:700;color:var(--primary);margin-bottom:4px}
.stat-item__label{font-size:.72rem;color:var(--muted)}

.product-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:20px}
.product-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:transform .2s,box-shadow .2s}
.product-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.product-card img{width:100%;aspect-ratio:16/10;object-fit:cover}
.product-card__body{padding:18px}
.product-card__cat{font-size:.65rem;padding:2px 8px;border-radius:999px;background:rgba(255,255,255,.08);color:var(--accent);display:inline-block;margin-bottom:6px}
.product-card__body h3{font-size:.95rem;margin-bottom:6px}
.product-card__desc{font-size:.78rem;color:var(--muted);line-height:1.5;margin-bottom:10px}
.product-card__price{font-size:.88rem;font-weight:600;color:var(--primary)}

.pricing-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.pricing-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px 20px;text-align:center;position:relative}
.pricing-card--highlight{border-color:var(--primary);box-shadow:var(--shadow);transform:scale(1.02)}
.pricing-card__badge{position:absolute;top:-10px;left:50%;transform:translateX(-50%);font-size:.65rem;padding:3px 12px;border-radius:999px;background:var(--primary);color:#fff}
.pricing-card h3{font-size:1rem;margin-bottom:8px}
.pricing-card__price{font-size:1.8rem;font-weight:700;color:var(--primary);margin-bottom:4px}
.pricing-card__period{font-size:.78rem;color:var(--muted);margin-bottom:12px}
.pricing-card__desc{font-size:.78rem;color:var(--muted);margin-bottom:16px;line-height:1.5}
.pricing-card ul{list-style:none;text-align:left;font-size:.78rem;color:var(--muted)}
.pricing-card li{padding:6px 0;border-bottom:1px solid var(--border)}
.pricing-card li::before{content:'✓ ';color:var(--primary)}

.customer-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:20px}
.customer-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px;display:flex;gap:16px}
.customer-card img{width:56px;height:56px;border-radius:50%;object-fit:cover;flex-shrink:0}
.customer-card h3{font-size:.95rem;margin-bottom:4px}
.customer-card__industry{font-size:.72rem;color:var(--primary);margin-bottom:8px}
.customer-card__result{font-size:.82rem;margin-bottom:8px;line-height:1.5}
.customer-card blockquote{font-size:.78rem;color:var(--muted);font-style:italic;border-left:3px solid var(--primary);padding-left:12px}

.docs-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px}
.doc-item{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px;transition:transform .2s,box-shadow .2s}
.doc-item:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.doc-item__cat{font-size:.65rem;padding:2px 8px;border-radius:999px;background:rgba(255,255,255,.06);color:var(--accent);display:inline-block;margin-bottom:8px}
.doc-item h3{font-size:.92rem;margin-bottom:8px}
.doc-item p{font-size:.8rem;color:var(--muted);line-height:1.5;margin-bottom:10px}
.doc-item footer{font-size:.72rem;color:var(--muted)}

.solutions-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.solution-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px;text-align:center}
.solution-card__icon{font-size:2rem;margin-bottom:12px}
.solution-card h3{font-size:.92rem;margin-bottom:8px}
.solution-card p{font-size:.78rem;color:var(--muted);line-height:1.5}

.detail-header{display:grid;grid-template-columns:400px 1fr;gap:32px;margin-bottom:32px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.detail-header img{width:100%;height:100%;object-fit:cover;min-height:260px}
.detail-header__info{padding:32px}
.detail-header__info h1{font-size:1.5rem;margin-bottom:12px}
.detail-header__info p{color:var(--muted);line-height:1.7;margin-bottom:16px}
.feature-list{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}
.feature-list span{font-size:.72rem;padding:4px 10px;border-radius:999px;border:1px solid var(--border);color:var(--accent)}

.filter-tabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:24px}
.filter-tab{padding:6px 14px;border:1px solid var(--border);border-radius:999px;background:var(--surface);color:var(--muted);font-size:.78rem;cursor:pointer;transition:all .2s}
.filter-tab.is-active,.filter-tab:hover{background:var(--primary);color:#fff;border-color:var(--primary)}

.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px}
.about-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px}
.about-card h2{font-size:1.1rem;margin-bottom:12px}
.about-card p{color:var(--muted);line-height:1.7;margin-bottom:12px}
.about-highlights{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:16px}
.about-highlights li{list-style:none;padding:12px;background:rgba(255,255,255,.04);border-radius:var(--radius);font-size:.85rem;text-align:center}

.dev-section{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px;margin-bottom:20px}
.dev-section h2{font-size:1rem;margin-bottom:12px;font-family:var(--mono,monospace)}
.dev-section pre{background:var(--bg);padding:16px;border-radius:var(--radius);overflow-x:auto;font-size:.78rem;line-height:1.6;font-family:var(--mono,monospace);color:var(--accent)}

.auth-card{padding:32px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius)}
.auth-tabs{display:flex;border-bottom:1px solid var(--border);margin-bottom:24px}
.auth-tab{flex:1;padding:12px;background:none;border:none;cursor:pointer;color:var(--muted)}
.auth-tab.is-active{color:var(--primary);font-weight:600;border-bottom:2px solid var(--primary)}
.auth-form label{display:block;margin-bottom:14px;font-size:.85rem;color:var(--muted)}
.auth-form input{width:100%;margin-top:6px;padding:12px;border:1px solid var(--border);border-radius:var(--radius);background:var(--bg)}

.btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 20px;border-radius:var(--radius);border:none;cursor:pointer;font-size:.82rem;font-weight:600;transition:all .2s}
.btn--primary{background:var(--primary);color:#fff}
.btn--primary:hover{opacity:.9}
.btn--outline{background:transparent;border:2px solid var(--primary);color:var(--primary)}
.btn--sm{padding:8px 14px;font-size:.75rem}
.btn--block{display:flex;width:100%}

/* Dashboard layout */
.dashboard-layout{display:grid;grid-template-columns:220px 1fr;gap:0;min-height:calc(100vh - 60px)}
.dashboard-sidebar{background:var(--surface);border-right:1px solid var(--border);padding:24px 16px}
.dashboard-sidebar a{display:block;padding:10px 14px;border-radius:var(--radius);font-size:.82rem;color:var(--muted);margin-bottom:4px}
.dashboard-sidebar a:hover,.dashboard-sidebar a.is-active{background:rgba(255,255,255,.06);color:var(--primary)}
.dashboard-main{padding:32px 24px}
.metric-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:28px}
.metric-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px}
.metric-card__label{font-size:.72rem;color:var(--muted);margin-bottom:8px}
.metric-card__value{font-size:1.4rem;font-weight:700;color:var(--primary)}

/* Bento layout */
.bento-grid{display:grid;grid-template-columns:repeat(4,1fr);grid-template-rows:auto auto;gap:16px;margin-bottom:28px}
.bento-item{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px;overflow:hidden}
.bento-item--hero{grid-column:span 2;grid-row:span 2;background-size:cover;background-position:center;min-height:280px;display:flex;align-items:flex-end;position:relative}
.bento-item--hero::after{content:'';position:absolute;inset:0;background:linear-gradient(transparent,rgba(0,0,0,.7))}
.bento-item--hero .bento-item__text{position:relative;z-index:1;color:#fff}
.bento-item--wide{grid-column:span 2}
.bento-item h3{font-size:.95rem;margin-bottom:6px}
.bento-item p{font-size:.78rem;color:var(--muted);line-height:1.5}

/* Split layout */
.split-hero{display:grid;grid-template-columns:1fr 1fr;min-height:400px}
.split-hero__text{display:flex;flex-direction:column;justify-content:center;padding:48px;background:var(--surface)}
.split-hero__visual{background-size:cover;background-position:center;min-height:300px}

.footer{padding:40px 24px 28px;border-top:1px solid var(--border);background:var(--surface)}
.footer__inner{max-width:1280px;margin:0 auto;display:grid;grid-template-columns:2fr repeat(3,1fr);gap:32px;margin-bottom:28px}
.footer__brand p{font-size:.82rem;color:var(--muted);line-height:1.6;margin-top:8px;max-width:280px}
.footer__col h4{font-size:.78rem;font-weight:700;margin-bottom:12px}
.footer__col a{display:block;font-size:.78rem;color:var(--muted);padding:4px 0}
.footer__col a:hover{color:var(--primary)}
.footer__bottom{max-width:1140px;margin:0 auto;padding-top:20px;border-top:1px solid var(--border);text-align:center;font-size:.72rem;color:var(--muted)}

.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);padding:12px 24px;background:var(--text);color:var(--surface);border-radius:var(--radius);opacity:0;transition:opacity .3s;z-index:200;pointer-events:none}
.toast.is-show{opacity:1}

@media(max-width:1024px){
  .pricing-grid{grid-template-columns:repeat(2,1fr)}
  .solutions-grid{grid-template-columns:repeat(2,1fr)}
  .bento-grid{grid-template-columns:repeat(2,1fr)}
  .bento-item--hero{grid-column:span 2}
  .metric-cards{grid-template-columns:repeat(2,1fr)}
}

@media(max-width:768px){
  .nav{display:none;position:absolute;top:60px;left:0;right:0;flex-direction:column;background:var(--surface);padding:16px;border-bottom:1px solid var(--border)}
  .header.nav-open .nav{display:flex}
  .nav-toggle{display:block}
  .stats-bar,.pricing-grid,.solutions-grid{grid-template-columns:1fr}
  .detail-header,.split-hero{grid-template-columns:1fr}
  .dashboard-layout{grid-template-columns:1fr}
  .dashboard-sidebar{display:none}
  .about-grid{grid-template-columns:1fr}
  .bento-grid{grid-template-columns:1fr}
  .footer__inner{grid-template-columns:1fr}
}

/* === 布局密度优化：减少留白、提升信息密度与视觉层次 === */
.container,.header__inner,.footer__inner,.hero__content,.hero-strip__inner{max-width:1280px;padding-left:20px;padding-right:20px}
.page{padding:20px 0 36px}
.page__sub{margin-bottom:14px}
.section__title{margin:18px 0 12px;font-size:1.1rem}
.stats-bar,.metric-cards{margin-bottom:16px}
.stat-item,.metric-card{padding:12px 10px}
.stat-item__num{font-size:clamp(1rem,2vw,1.35rem)}
.category-grid{grid-template-columns:repeat(auto-fill,minmax(100px,1fr));gap:8px;margin-bottom:16px}
.category-card{padding:10px 6px}
.hero{min-height:240px}
.hero--compact{min-height:160px}
.hero__content{padding:24px 20px}
.sidebar-layout{display:grid;grid-template-columns:1fr 300px;gap:20px;align-items:start}
.feed-layout{display:grid;grid-template-columns:1fr 300px;gap:20px;align-items:start}
.feed{gap:12px}
.post-card{padding:14px 16px}
.discover-grid{gap:18px}
.home-split{display:grid;grid-template-columns:1fr 300px;gap:20px;align-items:start}
.dept-grid,.product-grid,.course-grid,.articles-grid,.cases-grid{gap:14px}
.category-header{padding:18px;margin-bottom:16px}
.announcement-bar{padding:12px 16px;margin-bottom:16px}
.feed-tabs{margin-bottom:14px;padding-bottom:8px}
.expert-grid{gap:10px}
.wiki-list{gap:12px}
.bento-grid{gap:12px;margin-bottom:16px}
.footer{padding:28px 20px 20px}
.footer__inner{gap:24px;margin-bottom:16px}
.empty-state{padding:32px 16px}
@media(max-width:900px){
  .sidebar-layout,.feed-layout,.home-split{grid-template-columns:1fr}
}

:root{--bg:#0a1628;--surface:#111d32;--text:#e8f0fe;--muted:#8899b4;--primary:#0066ff;--primary-dark:#0052cc;--accent:#38bdf8;--border:#1e3a5f;--radius:8px;--shadow:0 8px 32px rgba(0,102,255,.2)}
body{font-family:"PingFang SC","Helvetica Neue",sans-serif;background:var(--bg);color:var(--text)}
.logo{color:var(--primary);font-weight:700}
.header{background:var(--surface);border-bottom:1px solid var(--border)}
.hero__tag{color:var(--accent)}
.btn--primary{background:var(--primary)}
.dashboard-sidebar a.is-active{background:rgba(0,102,255,.15);color:var(--primary)}
.metric-card{border-color:var(--border)}
.stat-item{background:var(--surface)}