:root{
  --primary:#0EA5E9;--primary-dark:#0284C7;--primary-light:rgba(14,165,233,.1);
  --cyan:#06B6D4;--cyan-light:rgba(6,182,212,.1);
  --dark:#0F172A;--dark2:#1E293B;--dark3:#334155;
  --bg:#F8FAFC;--surface:#FFFFFF;
  --text:#0F172A;--muted:#64748B;--border:#E2E8F0;
  --radius:10px;--shadow:0 2px 16px rgba(14,165,233,.08);--shadow-lg:0 8px 32px rgba(14,165,233,.14);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','Noto Sans SC',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}

/* NAVBAR */
.navbar{background:var(--dark);position:sticky;top:0;z-index:1000}
.navbar__inner{display:flex;align-items:center;justify-content:space-between;height:64px;max-width:1200px;margin:0 auto;padding:0 20px}
.navbar__brand{font-size:1.15rem;font-weight:800;color:#fff;display:flex;align-items:center;gap:8px}
.navbar__brand span{color:var(--cyan)}
.navbar__nav{display:flex;gap:2px;list-style:none}
.navbar__link{display:block;padding:8px 14px;border-radius:6px;color:rgba(255,255,255,.75);font-size:.88rem;font-weight:500;transition:all .3s}
.navbar__link:hover,.navbar__link--active{color:#fff;background:rgba(255,255,255,.08)}
.navbar__cta{display:flex;gap:8px}
.btn-outline-w{padding:7px 16px;border-radius:6px;border:1px solid rgba(255,255,255,.3);color:#fff;font-size:.85rem;transition:all .3s}
.btn-outline-w:hover{border-color:var(--cyan);color:var(--cyan)}
.btn-cyan{padding:7px 16px;border-radius:6px;background:var(--cyan);color:#fff;font-weight:700;font-size:.85rem;transition:all .3s}
.btn-cyan:hover{background:var(--primary)}

/* HERO */
.hero{position:relative;background:var(--dark);color:#fff;padding:80px 0;overflow:hidden}
.hero__bg{position:absolute;inset:0;background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='400' height='400'%3E%3Ccircle cx='200' cy='200' r='180' fill='none' stroke='rgba(6,182,212,0.06)' stroke-width='1'/%3E%3Ccircle cx='200' cy='200' r='120' fill='none' stroke='rgba(6,182,212,0.04)' stroke-width='1'/%3E%3C/svg%3E") center/cover;opacity:.5}
.hero__inner{position:relative;z-index:1;display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.hero__live-tag{display:inline-flex;align-items:center;gap:6px;background:rgba(6,182,212,.15);border:1px solid rgba(6,182,212,.3);color:var(--cyan);font-size:.78rem;font-weight:700;padding:4px 12px;border-radius:20px;margin-bottom:16px;letter-spacing:.5px}
.hero__live-dot{width:7px;height:7px;background:var(--cyan);border-radius:50%;animation:pulse 1.2s infinite}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.5;transform:scale(.8)}}
.hero__title{font-size:clamp(1.8rem,4vw,2.7rem);font-weight:800;line-height:1.25;margin-bottom:12px}
.hero__title span{color:var(--cyan)}
.hero__sub{color:rgba(255,255,255,.8);font-size:.95rem;line-height:1.8;margin-bottom:28px}
.hero__btns{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:28px}
.btn--cyan-solid{background:var(--cyan);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--cyan-solid:hover{background:var(--primary);transform:translateY(-2px);box-shadow:0 6px 20px rgba(6,182,212,.35)}
.btn--w-outline{border:1.5px solid rgba(255,255,255,.35);color:#fff;padding:12px 26px;border-radius:var(--radius);font-size:.95rem;display:inline-flex;align-items:center;gap:8px;transition:all .3s}
.btn--w-outline:hover{border-color:#fff;background:rgba(255,255,255,.08);color:#fff}
.hero__trust{display:flex;gap:16px;flex-wrap:wrap}
.hero__trust-item{display:flex;align-items:center;gap:5px;font-size:.8rem;color:rgba(255,255,255,.7)}
.hero__trust-item i{color:var(--cyan)}
/* 右侧功能入口 */
.hero__modules{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.hero__mod{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);border-radius:var(--radius);padding:18px;transition:all .3s;display:flex;align-items:flex-start;gap:12px}
.hero__mod:hover{background:rgba(6,182,212,.12);border-color:rgba(6,182,212,.3)}
.hero__mod-icon{font-size:1.5rem;flex-shrink:0}
.hero__mod-label{font-size:.75rem;color:var(--cyan);font-weight:700;margin-bottom:3px}
.hero__mod-name{font-weight:700;font-size:.88rem}
.hero__mod-desc{font-size:.75rem;color:rgba(255,255,255,.6);margin-top:3px}

/* STATS BAR */
.statsbar{background:var(--dark2);border-top:1px solid rgba(255,255,255,.05);border-bottom:1px solid rgba(255,255,255,.05);padding:20px 0}
.statsbar__inner{display:flex;justify-content:center;gap:48px;max-width:1200px;margin:0 auto;padding:0 20px;flex-wrap:wrap}
.stat-item{text-align:center}
.stat-item__num{font-size:1.6rem;font-weight:800;color:var(--cyan)}
.stat-item__label{font-size:.78rem;color:rgba(255,255,255,.6);margin-top:3px}

/* SECTION */
.section{padding:60px 0}
.section--white{background:var(--surface)}
.section--bg{background:var(--bg)}
.section--dark{background:var(--dark);color:#fff}
.section__hd{margin-bottom:40px}
.section__hd--center{text-align:center}
.section__eyebrow{display:inline-block;background:var(--primary-light);color:var(--primary);font-size:.75rem;font-weight:700;padding:3px 10px;border-radius:4px;margin-bottom:8px;letter-spacing:.5px}
.section__title{font-size:1.5rem;font-weight:800;margin-bottom:6px}
.section__title span{color:var(--cyan)}
.section__sub{color:var(--muted);font-size:.9rem}

/* 服务卡片 */
.service-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px}
.service-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px;text-align:center;box-shadow:var(--shadow);transition:all .3s}
.service-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--primary)}
.service-card__icon{font-size:1.8rem;margin-bottom:10px}
.service-card__name{font-weight:700;font-size:.9rem;margin-bottom:5px}
.service-card__desc{font-size:.8rem;color:var(--muted)}

/* 安全防御 */
.security-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;max-width:900px}
.sec-item{background:var(--surface);border:1px solid var(--border);border-left:3px solid var(--cyan);border-radius:0 var(--radius) var(--radius) 0;padding:18px 20px;transition:all .3s}
.sec-item:hover{box-shadow:var(--shadow)}
.sec-item__title{font-weight:700;font-size:.9rem;margin-bottom:6px;color:var(--text)}
.sec-item__desc{font-size:.83rem;color:var(--muted);line-height:1.7}

/* 用户评价 */
.reviews-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px}
.review-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);transition:all .3s}
.review-card:hover{box-shadow:var(--shadow-lg)}
.review-card__stars{color:#F59E0B;font-size:.85rem;margin-bottom:8px}
.review-card__text{font-size:.87rem;color:var(--muted);line-height:1.75;margin-bottom:12px}
.review-card__author{font-size:.78rem;font-weight:700;color:var(--text)}

/* 更新日志 */
.changelog{max-width:700px;display:flex;flex-direction:column;gap:16px}
.changelog-item{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:16px 20px;display:grid;grid-template-columns:140px 1fr;gap:16px;align-items:flex-start;transition:all .3s}
.changelog-item:hover{border-color:var(--primary)}
.changelog-item__date{font-size:.78rem;color:var(--cyan);font-weight:700;padding-top:3px}
.changelog-item__content{font-size:.87rem;color:var(--muted);line-height:1.7}
.changelog-item__tag{display:inline-block;background:var(--primary-light);color:var(--primary);font-size:.7rem;font-weight:700;padding:2px 8px;border-radius:4px;margin-bottom:6px}

/* 新闻 */
.news-cols{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px}
.news-col-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:all .3s}
.news-col-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.news-col-card__head{background:linear-gradient(135deg,var(--dark),var(--dark2));height:6px}
.news-col-card__body{padding:18px}
.news-col-card__cat{display:inline-block;background:var(--cyan-light);color:var(--cyan);font-size:.72rem;font-weight:700;padding:2px 8px;border-radius:12px;margin-bottom:8px}
.news-col-card__title{font-size:.9rem;font-weight:700;color:var(--text);line-height:1.5;margin-bottom:8px}
.news-col-card__title a{color:var(--text)}
.news-col-card__title a:hover{color:var(--primary)}
.news-col-card__meta{font-size:.75rem;color:var(--muted)}

/* FOOTER */
.footer{background:var(--dark);color:rgba(255,255,255,.55);padding:44px 0 20px}
.footer__grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;margin-bottom:28px}
.footer__brand{font-size:1.1rem;font-weight:800;color:#fff;margin-bottom:10px}
.footer__brand span{color:var(--cyan)}
.footer__desc{font-size:.82rem;line-height:1.8}
.footer__heading{color:rgba(255,255,255,.9);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:rgba(255,255,255,.55);font-size:.82rem;transition:color .3s}
.footer__links a:hover{color:var(--cyan)}
.footer__bottom{border-top:1px solid rgba(255,255,255,.08);padding-top:18px;text-align:center;font-size:.78rem}

/* 文章 */
.art-hd{background:var(--dark);color:#fff;padding:44px 0 32px}
.art-cat{display:inline-block;background:var(--cyan);color:#fff;font-size:.73rem;font-weight:700;padding:3px 10px;border-radius:4px;margin-bottom:10px}
.art-title{font-size:1.85rem;font-weight:800;line-height:1.3;margin-bottom:12px}
.art-meta{display:flex;gap:14px;font-size:.8rem;opacity:.8;flex-wrap:wrap}
.art-body{max-width:840px;margin:44px auto;padding:0 20px}
.art-body p{margin-bottom:16px;line-height:1.9;color:#374151}
.art-body h2{font-size:1.2rem;font-weight:700;margin:26px 0 12px;color:var(--text)}
.breadcrumb{font-size:.8rem;opacity:.8;margin-bottom:12px}
.breadcrumb a{color:rgba(255,255,255,.8)}
.breadcrumb span{color:#fff}

@media(max-width:768px){
  .hero__inner{grid-template-columns:1fr}
  .hero__modules{grid-template-columns:1fr 1fr}
  .security-grid{grid-template-columns:1fr}
  .footer__grid{grid-template-columns:1fr 1fr}
  .navbar__nav,.navbar__cta{display:none}
  .statsbar__inner{gap:24px}
  .art-title{font-size:1.4rem}
}
@media(max-width:480px){.footer__grid{grid-template-columns:1fr}.hero__modules{grid-template-columns:1fr}}