/* 快鸭 Kuaiya - 品牌官网样式 */
:root{
  --navy:#0E1B3C;--navy-2:#16264F;--cyan:#00D4FF;--cyan-2:#0AA8D6;--amber:#FFB800;
  --ink:#1A2438;--muted:#5A6680;--line:#E6EAF2;--bg:#F5F7FB;--card:#FFFFFF;
  --radius:16px;--shadow:0 8px 30px rgba(14,27,60,.08);
  --grad:linear-gradient(135deg,#00D4FF 0%,#0A6BFF 100%);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:"PingFang SC","Microsoft YaHei","Segoe UI",system-ui,-apple-system,sans-serif;color:var(--ink);background:var(--bg);line-height:1.7;font-size:16px}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
ul,ol{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:72px 0}
.section-title{font-size:34px;font-weight:800;text-align:center;color:var(--navy);letter-spacing:-.5px}
.section-sub{text-align:center;color:var(--muted);font-size:17px;margin:14px auto 0;max-width:640px}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 28px;border-radius:999px;font-size:16px;font-weight:700;transition:transform .2s,box-shadow .2s;cursor:pointer;border:none}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 8px 22px rgba(0,180,255,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(0,180,255,.5)}
.btn-amber{background:var(--amber);color:#1A2438;box-shadow:0 8px 20px rgba(255,184,0,.35)}
.btn-amber:hover{transform:translateY(-2px)}
.btn-ghost{background:transparent;color:var(--navy);border:2px solid var(--line)}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan-2)}
.btn-sm{padding:9px 18px;font-size:14px}

/* 顶部导航 */
.header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.9);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{display:flex;align-items:center;gap:10px}
.logo img{width:38px;height:38px;border-radius:10px}
.logo span{font-size:22px;font-weight:800;color:var(--navy)}
.logo small{display:block;font-size:11px;color:var(--muted);font-weight:400;line-height:1}
.nav{display:flex;align-items:center;gap:26px}
.nav a{font-size:15px;font-weight:600;color:var(--ink);position:relative}
.nav a:hover{color:var(--cyan-2)}
.nav .lang{font-weight:700;color:var(--cyan-2)}
.nav .cta{padding:9px 20px;background:var(--grad);color:#fff;border-radius:999px}
.nav .cta:hover{color:#fff;box-shadow:0 6px 16px rgba(0,180,255,.4)}

/* Hero */
.hero{background:radial-gradient(1200px 500px at 20% -10%,#0e2a5e 0%,var(--navy) 55%,#0a1230 100%);color:#fff;padding:80px 0 100px;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(0,212,255,.12);border:1px solid rgba(0,212,255,.35);color:#7FE7FF;padding:7px 16px;border-radius:999px;font-size:13px;font-weight:600}
.hero h1{font-size:46px;font-weight:800;line-height:1.25;margin:20px 0 16px;letter-spacing:-1px}
.hero p{font-size:18px;color:#B9C4DE;max-width:520px;margin-bottom:28px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{display:flex;gap:32px;margin-top:36px}
.hero-stats div b{display:block;font-size:30px;font-weight:800;color:#fff}
.hero-stats div span{font-size:13px;color:#8EA0C8}
/* 客户端模拟器 */
.simulator{background:#0B1530;border:1px solid rgba(0,212,255,.25);border-radius:20px;box-shadow:0 30px 70px rgba(0,0,0,.45);overflow:hidden}
.sim-head{display:flex;align-items:center;gap:8px;padding:14px 18px;background:#111D42;border-bottom:1px solid rgba(255,255,255,.06)}
.sim-dot{width:11px;height:11px;border-radius:50%}
.sim-title{color:#7FE7FF;font-size:13px;margin-left:8px;font-weight:600}
.sim-body{padding:20px}
.sim-status{display:flex;align-items:center;justify-content:space-between;background:rgba(0,212,255,.08);border:1px solid rgba(0,212,255,.3);border-radius:12px;padding:14px 16px}
.sim-status .lbl{font-size:14px;color:#CFDAF0}
.sim-status .val{font-size:13px;color:#7FE7FF;font-weight:700}
.sim-connect{display:flex;align-items:center;gap:10px}
.sim-pill{width:10px;height:10px;border-radius:50%;background:#00D46A;box-shadow:0 0 10px #00D46A}
.sim-metric{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:16px}
.sim-metric .m{background:#0E1B3C;border-radius:12px;padding:14px;text-align:center}
.sim-metric .m b{display:block;font-size:22px;color:#7FE7FF;font-weight:700}
.sim-metric .m span{font-size:12px;color:#8EA0C8}
.sim-node{display:flex;justify-content:space-between;align-items:center;background:#0E1B3C;border-radius:12px;padding:14px 16px;margin-top:12px}
.sim-node .n{display:flex;align-items:center;gap:10px;font-size:14px;color:#CFDAF0}
.sim-node .flag{font-size:18px}
.sim-node .ms{font-size:12px;color:#00D46A;font-weight:700}

/* 核心功能 */
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:44px}
.feature{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:30px;transition:transform .25s,box-shadow .25s}
.feature:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.feature .ic{width:54px;height:54px;border-radius:14px;background:linear-gradient(135deg,rgba(0,212,255,.15),rgba(10,107,255,.15));display:flex;align-items:center;justify-content:center;font-size:26px;margin-bottom:18px}
.feature h3{font-size:20px;font-weight:700;color:var(--navy);margin-bottom:10px}
.feature p{color:var(--muted);font-size:15px}

/* 公告区 */
.notice{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:30px;margin-top:44px;display:flex;gap:24px;align-items:flex-start}
.notice .tag{flex-shrink:0;background:var(--amber);color:#1A2438;font-weight:800;padding:5px 14px;border-radius:8px;font-size:14px}
.notice ul{flex:1}
.notice li{padding:12px 0;border-bottom:1px dashed var(--line);display:flex;justify-content:space-between;gap:16px}
.notice li:last-child{border-bottom:none}
.notice li span{color:var(--ink);font-weight:500}
.notice li time{color:var(--muted);font-size:13px;flex-shrink:0}

/* 信任背书 */
.trust{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:44px}
.trust .t{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;text-align:center}
.trust .t .n{font-size:34px;font-weight:800;color:var(--navy)}
.trust .t p{color:var(--muted);font-size:14px;margin-top:4px}
.trust .t .n em{font-style:normal;color:var(--cyan-2)}

/* 应用场景 */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:44px}
.scene{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.scene .sc-img{height:160px;display:flex;align-items:center;justify-content:center;font-size:60px}
.scene .sc-body{padding:22px}
.scene h3{font-size:19px;font-weight:700;color:var(--navy);margin-bottom:8px}
.scene p{color:var(--muted);font-size:14px}

/* 对比表 */
.cmp-wrap{margin-top:44px;overflow-x:auto}
.cmp{width:100%;border-collapse:collapse;background:var(--card);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.cmp th,.cmp td{padding:16px 20px;text-align:center;border-bottom:1px solid var(--line);font-size:15px}
.cmp th{background:var(--navy);color:#fff;font-weight:700}
.cmp th.hl{background:var(--grad)}
.cmp td:first-child{text-align:left;font-weight:600;color:var(--navy)}
.cmp .yes{color:#00B36B;font-weight:700}
.cmp .no{color:#C0392B}
.cmp tr:last-child td{border-bottom:none}

/* 新闻 Tab */
.tabs{display:flex;gap:10px;justify-content:center;margin-top:36px;flex-wrap:wrap}
.tab-btn{display:inline-flex;padding:10px 22px;border-radius:999px;background:var(--card);border:1px solid var(--line);font-weight:600;font-size:15px;color:var(--muted)}
.tab-btn.active{background:var(--grad);color:#fff;border-color:transparent}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:36px}
.news-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:transform .25s,box-shadow .25s}
.news-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.news-card .nc-img{height:150px;display:flex;align-items:center;justify-content:center;font-size:44px;background:linear-gradient(135deg,#0e2a5e,#16264F)}
.news-card .nc-body{padding:20px}
.news-card .nc-cat{font-size:12px;color:var(--cyan-2);font-weight:700}
.news-card h4{font-size:16px;font-weight:700;color:var(--navy);margin:8px 0;line-height:1.5}
.news-card .nc-time{font-size:12px;color:var(--muted)}

/* 用户评论 */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:44px}
.review{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.review .stars{color:var(--amber);font-size:16px;letter-spacing:2px}
.review p{color:var(--ink);font-size:15px;margin:12px 0;line-height:1.8}
.review .r-user{display:flex;align-items:center;gap:10px}
.review .av{width:38px;height:38px;border-radius:50%;background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700}
.review .r-user b{font-size:14px;color:var(--navy);display:block}
.review .r-user span{font-size:12px;color:var(--muted)}

/* 下载区 */
.dl-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:20px;margin-top:44px}
.dl-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px 20px;text-align:center;transition:transform .25s}
.dl-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:var(--cyan)}
.dl-card .ic{font-size:40px}
.dl-card h4{font-size:16px;font-weight:700;color:var(--navy);margin:12px 0 6px}
.dl-card p{font-size:12px;color:var(--muted);margin-bottom:16px}

/* FAQ */
.faq-list{margin-top:44px;max-width:820px;margin-left:auto;margin-right:auto}
.faq-item{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);margin-bottom:14px;overflow:hidden}
.faq-q{display:flex;justify-content:space-between;align-items:center;padding:20px 24px;font-weight:700;color:var(--navy);font-size:16px;cursor:pointer}
.faq-q .pm{color:var(--cyan-2);font-size:22px}
.faq-a{padding:0 24px 20px;color:var(--muted);font-size:15px;line-height:1.9}
.faq-a ol{padding-left:22px}
.faq-a ol li{list-style:decimal;margin:6px 0}

/* CTA */
.cta-band{background:radial-gradient(900px 400px at 50% -20%,#0e2a5e,var(--navy) 70%);color:#fff;border-radius:24px;padding:56px 40px;text-align:center;margin-top:44px}
.cta-band h2{font-size:32px;font-weight:800;margin-bottom:14px}
.cta-band p{color:#B9C4DE;margin-bottom:28px}

/* 页脚 */
.footer{background:#0A1230;color:#8EA0C8;padding:56px 0 0;margin-top:72px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:36px}
.footer h4{color:#fff;font-size:16px;margin-bottom:16px}
.footer a{display:block;color:#8EA0C8;font-size:14px;margin:8px 0}
.footer a:hover{color:#7FE7FF}
.footer .f-logo{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer .f-logo img{width:34px;height:34px;border-radius:8px}
.footer .f-logo span{color:#fff;font-size:20px;font-weight:800}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);margin-top:40px;padding:20px 0;text-align:center;font-size:13px}
.footer-bottom a{display:inline;color:#8EA0C8;margin:0 8px}

/* 面包屑 */
.crumb{background:var(--card);border-bottom:1px solid var(--line);padding:14px 0}
.crumb .container{display:flex;flex-wrap:wrap;gap:6px;font-size:14px;color:var(--muted)}
.crumb a{color:var(--cyan-2)}
.crumb span{color:var(--muted)}

/* 文章页 */
.article-layout{display:grid;grid-template-columns:1fr 320px;gap:40px;margin-top:40px}
.article-main{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:44px}
.article-main h1{font-size:30px;font-weight:800;color:var(--navy);line-height:1.4;margin-bottom:16px}
.article-meta{display:flex;gap:16px;color:var(--muted);font-size:13px;margin-bottom:24px;flex-wrap:wrap}
.article-meta .cat{color:var(--cyan-2);font-weight:700}
.article-main h2{font-size:22px;font-weight:700;color:var(--navy);margin:32px 0 14px;padding-left:12px;border-left:4px solid var(--cyan)}
.article-main p{color:var(--ink);font-size:16px;line-height:1.9;margin:14px 0}
.article-main img{width:100%;border-radius:12px;margin:20px 0}
.article-main .figcap{font-size:13px;color:var(--muted);text-align:center;margin:-10px 0 20px}
.article-main table{width:100%;border-collapse:collapse;margin:20px 0}
.article-main table th,.article-main table td{border:1px solid var(--line);padding:12px 14px;font-size:14px;text-align:left}
.article-main table th{background:var(--bg);color:var(--navy);font-weight:700}
.article-main blockquote{border-left:4px solid var(--cyan);background:var(--bg);padding:16px 20px;border-radius:0 12px 12px 0;color:var(--muted);font-size:15px;margin:20px 0}
.article-nav{display:flex;justify-content:space-between;gap:20px;margin-top:36px;padding-top:24px;border-top:1px solid var(--line)}
.article-nav a{font-size:14px;color:var(--cyan-2);font-weight:600}
.article-nav a:hover{text-decoration:underline}
.back-list{display:inline-flex;margin-top:24px;font-size:14px;color:var(--cyan-2);font-weight:700}
/* 侧栏 */
.sidebar .s-box{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;margin-bottom:24px}
.sidebar .s-box h3{font-size:17px;font-weight:700;color:var(--navy);margin-bottom:14px;padding-bottom:10px;border-bottom:2px solid var(--cyan)}
.sidebar .s-box a{display:flex;gap:8px;font-size:14px;color:var(--ink);margin:10px 0;line-height:1.5}
.sidebar .s-box a:hover{color:var(--cyan-2)}
.sidebar .s-box .hot-n{color:var(--amber);font-weight:800;width:20px;flex-shrink:0}

/* 相关阅读 */
.related{margin-top:40px}
.related h3{font-size:22px;font-weight:800;color:var(--navy);margin-bottom:20px}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}

/* 评论列表 */
.comments{margin-top:40px}
.comments h3{font-size:20px;font-weight:800;color:var(--navy);margin-bottom:20px}
.comment{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px;margin-bottom:14px}
.comment .c-head{display:flex;align-items:center;gap:10px;margin-bottom:10px}
.comment .av{width:34px;height:34px;border-radius:50%;background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px}
.comment .c-head b{font-size:14px;color:var(--navy)}
.comment .c-head span{font-size:12px;color:var(--muted);margin-left:auto}
.comment p{font-size:14px;color:var(--ink);line-height:1.8}

/* 新闻列表页 */
.news-list-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin-top:40px}

/* 下载页/FAQ页 */
.simple-page .hero-mini{background:radial-gradient(900px 400px at 30% -10%,#0e2a5e,var(--navy));color:#fff;padding:60px 0;text-align:center}
.simple-page .hero-mini h1{font-size:36px;font-weight:800}
.simple-page .hero-mini p{color:#B9C4DE;margin-top:12px}

/* 404 */
.notfound{min-height:70vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:40px}
.notfound h1{font-size:120px;font-weight:800;color:var(--navy);line-height:1}
.notfound p{color:var(--muted);font-size:18px;margin:20px 0 30px}

/* 响应式 */
@media(max-width:1024px){
  .hero-grid{grid-template-columns:1fr}
  .features-grid,.scene-grid,.review-grid{grid-template-columns:repeat(2,1fr)}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .dl-grid{grid-template-columns:repeat(2,1fr)}
  .trust{grid-template-columns:repeat(2,1fr)}
  .article-layout{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
  .news-list-grid{grid-template-columns:1fr}
  .related-grid{grid-template-columns:1fr}
}
@media(max-width:640px){
  .nav{display:none}
  .hero h1{font-size:32px}
  .section-title{font-size:26px}
  .features-grid,.scene-grid,.review-grid,.news-grid,.dl-grid,.trust,.footer-grid{grid-template-columns:1fr}
  .hero-stats{flex-wrap:wrap;gap:20px}
  .article-main{padding:24px}
}