:root{
  --primary:#7C3AED;--primary-dark:#6d28d9;--primary-light:rgba(124,58,237,.1);
  --secondary:#06B6D4;--secondary-light:rgba(6,182,212,.1);
  --accent:#F59E0B;
  --bg:#F5FAFF;--surface:#FFFFFF;--text:#0F172A;--muted:#475569;--border:#DAE8F5;
  --ri:#e2eef9;--radius:10px;--shadow:0 2px 16px rgba(124,58,237,.08);--shadow-lg:0 8px 32px rgba(124,58,237,.14);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
body{font-family:'Noto Sans SC',-apple-system,BlinkMacSystemFont,sans-serif;background:var(--bg);color:var(--text);line-height:1.7}
a{color:var(--primary);text-decoration:none;transition:all .3s}
a:hover{color:var(--primary-dark)}
img{max-width:100%;height:auto}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}

/* HEADER */
.header{background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:1000;box-shadow:0 1px 8px rgba(124,58,237,.06)}
.header__inner{display:flex;align-items:center;justify-content:space-between;height:68px;max-width:1200px;margin:0 auto;padding:0 20px}
.logo__text{font-size:1.25rem;font-weight:800;color:var(--text)}
.logo__text span{color:var(--primary)}
.nav__list{display:flex;gap:2px;list-style:none}
.nav__link{padding:8px 14px;border-radius:8px;color:var(--muted);font-size:.9rem;font-weight:500;transition:all .25s}
.nav__link:hover,.nav__link--active{background:var(--primary-light);color:var(--primary)}
.nav__actions{display:flex;gap:10px}
.btn-login{padding:8px 18px;border-radius:8px;border:1.5px solid var(--border);color:var(--muted);font-size:.88rem;transition:all .3s}
.btn-login:hover{border-color:var(--primary);color:var(--primary)}
.btn-reg{padding:8px 18px;border-radius:8px;background:var(--primary);color:#fff;font-weight:700;font-size:.88rem;transition:all .3s}
.btn-reg:hover{background:var(--primary-dark)}

/* HERO */
.hero{background:var(--surface);border-bottom:1px solid var(--border);padding:64px 0;position:relative;overflow:hidden}
.hero::after{content:'';position:absolute;top:-60px;right:-60px;width:400px;height:400px;background:radial-gradient(circle,rgba(124,58,237,.06),transparent 70%);border-radius:50%}
.hero__grid{display:grid;grid-template-columns:1.1fr 1fr;gap:48px;align-items:center;position:relative;z-index:1}
.hero__tag{display:inline-flex;align-items:center;gap:6px;background:var(--primary-light);color:var(--primary);font-size:.78rem;font-weight:700;padding:4px 12px;border-radius:20px;margin-bottom:16px}
.hero__title{font-size:clamp(1.8rem,4vw,2.8rem);font-weight:800;line-height:1.25;margin-bottom:12px}
.hero__title span{color:var(--primary)}
.hero__sub{color:var(--muted);font-size:.95rem;line-height:1.8;margin-bottom:28px}
.hero__btns{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:24px}
.btn--purple{background:var(--primary);color:#fff;padding:12px 26px;border-radius:var(--radius);font-weight:700;font-size:.95rem;display:inline-flex;align-items:center;gap:8px;transition:all .3s}
.btn--purple:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 6px 20px rgba(124,58,237,.3)}
.btn--outline{border:1.5px solid var(--border);color:var(--muted);padding:12px 26px;border-radius:var(--radius);font-size:.95rem;display:inline-flex;align-items:center;gap:8px;transition:all .3s}
.btn--outline:hover{border-color:var(--primary);color:var(--primary)}
.hero__badges{display:flex;gap:14px;flex-wrap:wrap}
.hero__badge{display:flex;align-items:center;gap:6px;font-size:.82rem;color:var(--muted)}
.hero__badge::before{content:'✓';color:var(--primary);font-weight:700}
/* 右侧快捷入口 */
.hero__quickbar{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.qbar-item{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:16px;display:flex;align-items:center;gap:12px;transition:all .3s}
.qbar-item:hover{border-color:var(--primary);background:var(--primary-light)}
.qbar-icon{font-size:1.5rem;flex-shrink:0}
.qbar-label{font-weight:700;font-size:.85rem;color:var(--text);margin-bottom:2px}
.qbar-sub{font-size:.75rem;color:var(--muted)}

/* 快速导航条 */
.quickstrip{background:var(--surface);border-bottom:1px solid var(--border);overflow-x:auto;scrollbar-width:none}
.quickstrip::-webkit-scrollbar{display:none}
.quickstrip__inner{display:flex;gap:0;max-width:1200px;margin:0 auto;padding:0 20px}
.qs-item{padding:12px 16px;font-size:.85rem;color:var(--muted);font-weight:500;white-space:nowrap;border-bottom:2px solid transparent;transition:all .3s;display:flex;align-items:center;gap:5px}
.qs-item:hover,.qs-item--active{color:var(--primary);border-color:var(--primary)}

/* SECTION */
.section{padding:56px 0}
.section--white{background:var(--surface)}
.section--bg{background:var(--bg)}
.section__hd{margin-bottom:40px}
.section__title{font-size:1.5rem;font-weight:800;margin-bottom:6px}
.section__title span{color:var(--primary)}
.section__sub{color:var(--muted);font-size:.9rem}

/* 特点卡片 */
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px}
.feat{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px;transition:all .3s}
.feat:hover{border-color:var(--primary);box-shadow:var(--shadow)}
.feat__icon{width:44px;height:44px;background:var(--primary-light);border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:1.2rem;margin-bottom:12px}
.feat__title{font-weight:700;font-size:.9rem;margin-bottom:6px}
.feat__desc{color:var(--muted);font-size:.82rem;line-height:1.7}

/* 新闻区 */
.news-list-wide{display:flex;flex-direction:column;gap:12px}
.news-row-item{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:16px 20px;display:grid;grid-template-columns:80px 1fr auto;gap:14px;align-items:center;transition:all .3s}
.news-row-item:hover{border-color:var(--primary)}
.news-row-item__cat{font-size:.72rem;color:var(--primary);font-weight:700;background:var(--primary-light);padding:2px 8px;border-radius:12px;white-space:nowrap;text-align:center}
.news-row-item__title{font-weight:600;font-size:.9rem;color:var(--text);line-height:1.4}
.news-row-item__title a{color:var(--text)}
.news-row-item__title a:hover{color:var(--primary)}
.news-row-item__date{font-size:.78rem;color:var(--muted);white-space:nowrap}

/* 平台简介 */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.about-tabs{display:flex;gap:8px;margin-bottom:16px}
.about-tab{padding:6px 16px;border-radius:20px;font-size:.82rem;font-weight:600;cursor:pointer;transition:all .3s;border:1px solid var(--border);color:var(--muted)}
.about-tab.active{background:var(--primary);color:#fff;border-color:var(--primary)}
.about-content{color:var(--muted);font-size:.9rem;line-height:1.9}
.stats-row{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:24px}
.stat-box{background:var(--bg);border-radius:var(--radius);padding:16px;text-align:center}
.stat-box__num{font-size:1.5rem;font-weight:800;color:var(--primary)}
.stat-box__label{font-size:.78rem;color:var(--muted);margin-top:4px}

/* FAQ */
.faq-accordion{display:flex;flex-direction:column;gap:10px;max-width:760px}
.faq-acc-item{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.faq-acc-q{padding:16px 20px;font-weight:700;font-size:.9rem;color:var(--text);cursor:pointer;display:flex;justify-content:space-between;align-items:center}
.faq-acc-q::after{content:'?';background:var(--primary-light);color:var(--primary);width:22px;height:22px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:.78rem;font-weight:800;flex-shrink:0}
.faq-acc-a{padding:0 20px 16px;color:var(--muted);font-size:.87rem;line-height:1.75}

/* footer */
.footer{background:#0F172A;color:#64748b;padding:44px 0 20px}
.footer__grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;margin-bottom:32px}
.footer__brand{font-size:1.1rem;font-weight:800;color:#fff;margin-bottom:10px}
.footer__brand span{color:var(--primary)}
.footer__desc{font-size:.82rem;line-height:1.8}
.footer__heading{color:#e2e8f0;font-weight:700;font-size:.87rem;margin-bottom:12px}
.footer__links{list-style:none;display:flex;flex-direction:column;gap:8px}
.footer__links a{color:#64748b;font-size:.82rem;transition:color .3s}
.footer__links a:hover{color:var(--primary)}
.footer__bottom{border-top:1px solid #1e293b;padding-top:18px;text-align:center;font-size:.78rem}
.footer__panel{background:#1e293b;border-radius:var(--radius);padding:20px 24px;display:flex;gap:14px;align-items:center;justify-content:center;margin-top:20px;flex-wrap:wrap}
.footer__panel a{padding:8px 18px;border-radius:8px;font-size:.85rem;font-weight:600;transition:all .3s}
.fp-reg{background:var(--primary);color:#fff}
.fp-reg:hover{background:var(--primary-dark);color:#fff}
.fp-login{border:1px solid #334155;color:#94a3b8}
.fp-login:hover{border-color:var(--primary);color:var(--primary)}
.fp-dl{border:1px solid #334155;color:#94a3b8}
.fp-dl:hover{border-color:var(--secondary);color:var(--secondary)}

/* 文章 */
.article-hd{background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;padding:44px 0 32px}
.article-cat{display:inline-block;background:rgba(255,255,255,.2);color:#fff;font-size:.73rem;font-weight:700;padding:3px 12px;border-radius:20px;margin-bottom:10px}
.article-title{font-size:1.85rem;font-weight:800;line-height:1.3;margin-bottom:12px}
.article-meta{display:flex;gap:14px;font-size:.8rem;opacity:.85;flex-wrap:wrap}
.article-body{max-width:840px;margin:44px auto;padding:0 20px}
.article-body p{margin-bottom:16px;line-height:1.9;color:#374151}
.article-body h2{font-size:1.2rem;font-weight:700;margin:26px 0 12px;color:var(--text)}
.breadcrumb{font-size:.8rem;opacity:.85;margin-bottom:12px}
.breadcrumb a{color:rgba(255,255,255,.85)}
.breadcrumb span{color:#fff}

@media(max-width:768px){
  .hero__grid,.about-grid,.footer__grid{grid-template-columns:1fr}
  .hero__quickbar{grid-template-columns:1fr 1fr}
  .nav__list,.nav__actions{display:none}
  .article-title{font-size:1.35rem}
  .news-row-item{grid-template-columns:1fr;gap:8px}
}
@media(max-width:480px){.footer__grid{grid-template-columns:1fr}.hero__quickbar{grid-template-columns:1fr}}