/* 快鸭 KuaiYa - 品牌官网样式 */
:root{
  --navy:#0A1A2F; --navy-2:#0E2238; --navy-3:#122B46;
  --cyan:#00D4FF; --cyan-d:#00A8CC; --orange:#FF7A00; --orange-d:#E06A00;
  --text:#1B2B3A; --muted:#5A6B7A; --line:#E4EAF0; --bg:#F5F8FB;
  --white:#FFFFFF; --green:#12B76A;
  --radius:14px; --radius-sm:9px;
  --shadow:0 6px 24px rgba(10,26,47,.08); --shadow-lg:0 16px 48px rgba(10,26,47,.14);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--text);background:var(--bg);line-height:1.7;font-size:16px}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:1180px;margin:0 auto;padding:0 22px}
section{padding:72px 0}
h1,h2,h3,h4{line-height:1.3;color:var(--navy);font-weight:700}
.section-head{text-align:center;max-width:760px;margin:0 auto 46px}
.section-head .kicker{display:inline-block;color:var(--cyan-d);font-weight:700;font-size:14px;letter-spacing:1px;text-transform:uppercase;margin-bottom:12px}
.section-head h2{font-size:34px;margin-bottom:14px}
.section-head p{color:var(--muted);font-size:16px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;border-radius:999px;padding:13px 30px;font-size:16px;transition:all .22s;cursor:pointer;border:none;white-space:nowrap}
.btn-primary{background:linear-gradient(135deg,var(--cyan),var(--cyan-d));color:#04222e;box-shadow:0 8px 22px rgba(0,212,255,.32)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(0,212,255,.44)}
.btn-orange{background:linear-gradient(135deg,var(--orange),var(--orange-d));color:#fff;box-shadow:0 8px 22px rgba(255,122,0,.32)}
.btn-orange:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(255,122,0,.44)}
.btn-ghost{background:#fff;color:var(--navy);border:1.5px solid var(--line)}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan-d)}
.btn-lg{padding:16px 40px;font-size:18px}

/* 顶部导航 */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:70px}
.brand{display:flex;align-items:center;gap:11px;font-weight:800;font-size:22px;color:var(--navy)}
.brand img{width:38px;height:38px;border-radius:9px}
.brand .brand-name b{color:var(--cyan-d)}
.nav-links{display:flex;align-items:center;gap:28px}
.nav-links a{font-size:15px;font-weight:600;color:var(--text);position:relative;padding:6px 0}
.nav-links a:hover,.nav-links a.active{color:var(--cyan-d)}
.nav-links a.active::after{content:"";position:absolute;left:0;bottom:-2px;width:100%;height:2.5px;background:var(--cyan);border-radius:2px}
.nav-actions{display:flex;align-items:center;gap:14px}
.lang-switch{display:flex;border:1.5px solid var(--line);border-radius:999px;overflow:hidden}
.lang-switch a{padding:6px 14px;font-size:13px;font-weight:700;color:var(--muted)}
.lang-switch a.active{background:var(--navy);color:#fff}
.nav-cta{font-size:14px;padding:10px 22px}

/* Hero + 客户端模拟器 */
.hero{background:linear-gradient(160deg,#0A1A2F 0%,#0E2238 55%,#12304a 100%);color:#fff;padding:70px 0 90px;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;width:560px;height:560px;border-radius:50%;background:radial-gradient(circle,rgba(0,212,255,.22),transparent 65%);top:-160px;right:-100px}
.hero::after{content:"";position:absolute;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(255,122,0,.16),transparent 65%);bottom:-140px;left:-80px}
.hero-inner{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center;z-index:2}
.hero h1{color:#fff;font-size:44px;margin:18px 0 20px;letter-spacing:.5px}
.hero h1 .hl{background:linear-gradient(90deg,var(--cyan),#7ce7ff);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .subtitle{color:#b8c8d8;font-size:18px;max-width:520px;margin-bottom:30px}
.hero-badges{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:28px}
.hero-badges span{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);padding:7px 14px;border-radius:999px;font-size:13px;color:#d5e4f0}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{display:flex;gap:34px;margin-top:38px;flex-wrap:wrap}
.hero-stats .stat b{display:block;font-size:28px;color:var(--cyan)}
.hero-stats .stat span{font-size:13px;color:#93a9bd}

/* 客户端模拟器 */
.simulator{background:#fff;border-radius:18px;box-shadow:0 24px 64px rgba(0,0,0,.35);overflow:hidden;border:1px solid rgba(255,255,255,.08)}
.sim-titlebar{display:flex;align-items:center;gap:8px;padding:12px 16px;background:linear-gradient(180deg,#12304a,#0E2238);border-bottom:1px solid rgba(255,255,255,.1)}
.sim-titlebar .dot{width:11px;height:11px;border-radius:50%}
.sim-titlebar .dot.r{background:#ff5f57}.sim-titlebar .dot.y{background:#febc2e}.sim-titlebar .dot.g{background:#28c840}
.sim-titlebar .ttl{margin-left:8px;color:#cfe0ee;font-size:13px;font-weight:600}
.sim-body{display:grid;grid-template-columns:190px 1fr;min-height:340px}
.sim-side{background:#0E2238;padding:18px 12px;display:flex;flex-direction:column;gap:8px}
.sim-side .s-item{padding:11px 14px;border-radius:10px;font-size:14px;color:#9fb4c8;display:flex;align-items:center;gap:9px;font-weight:600}
.sim-side .s-item.on{background:linear-gradient(135deg,var(--cyan),var(--cyan-d));color:#04222e}
.sim-main{padding:22px;background:linear-gradient(180deg,#f8fbfe,#eef4fa)}
.sim-card{background:#fff;border-radius:12px;padding:18px;box-shadow:var(--shadow);margin-bottom:14px}
.sim-connect{display:flex;align-items:center;justify-content:space-between}
.sim-btn{width:92px;height:92px;border-radius:50%;background:linear-gradient(135deg,var(--cyan),var(--cyan-d));display:flex;align-items:center;justify-content:center;color:#04222e;font-weight:800;font-size:15px;box-shadow:0 10px 26px rgba(0,212,255,.4)}
.sim-speed{display:flex;justify-content:space-between;margin-top:10px}
.sim-speed .sp b{display:block;font-size:20px;color:var(--navy)}
.sim-speed .sp span{font-size:12px;color:var(--muted)}
.sim-progress{height:8px;background:#e4eaf0;border-radius:6px;overflow:hidden;margin-top:8px}
.sim-progress i{display:block;height:100%;width:72%;background:linear-gradient(90deg,var(--cyan),var(--green));border-radius:6px}
.sim-node{display:flex;align-items:center;justify-content:space-between;font-size:14px;padding:10px 0;border-bottom:1px solid var(--line)}
.sim-node:last-child{border:none}
.sim-node .loc{display:flex;align-items:center;gap:8px;font-weight:600}
.sim-node .ping{color:var(--green);font-weight:700}

/* 核心功能 */
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{background:#fff;border-radius:var(--radius);padding:30px 26px;box-shadow:var(--shadow);transition:all .25s;border:1px solid transparent}
.feature-card:hover{transform:translateY(-6px);border-color:#cdeef8;box-shadow:var(--shadow-lg)}
.feature-icon{width:56px;height:56px;border-radius:14px;background:linear-gradient(135deg,#e0f7ff,#cdeef8);display:flex;align-items:center;justify-content:center;font-size:26px;margin-bottom:18px}
.feature-card h3{font-size:19px;margin-bottom:10px}
.feature-card p{color:var(--muted);font-size:15px}

/* 公告区 */
.notice-band{background:linear-gradient(135deg,#0A1A2F,#12304a);color:#fff;padding:0}
.notice-inner{display:flex;align-items:center;gap:16px;padding:20px 0}
.notice-tag{background:var(--orange);color:#fff;font-weight:800;font-size:13px;padding:4px 12px;border-radius:999px;flex-shrink:0}
.notice-text{color:#d5e4f0;font-size:15px;flex:1}
.notice-text a{color:var(--cyan);font-weight:600}
.notice-text a:hover{text-decoration:underline}

/* 信任背书 */
.trust-strip{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.trust-item b{display:block;font-size:30px;color:var(--cyan-d)}
.trust-item span{color:var(--muted);font-size:14px}

/* 应用场景 */
.scene-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.scene-card{background:#fff;border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);display:flex;gap:18px;align-items:flex-start}
.scene-card .sc-icon{width:50px;height:50px;border-radius:12px;background:linear-gradient(135deg,#fff3e6,#ffe3c4);display:flex;align-items:center;justify-content:center;font-size:24px;flex-shrink:0}
.scene-card h3{font-size:18px;margin-bottom:8px}
.scene-card p{color:var(--muted);font-size:14.5px}

/* 对比表 */
.compare-wrap{overflow-x:auto;background:#fff;border-radius:var(--radius);box-shadow:var(--shadow)}
.compare-table{width:100%;border-collapse:collapse;min-width:640px}
.compare-table th,.compare-table td{padding:16px 18px;text-align:center;border-bottom:1px solid var(--line);font-size:15px}
.compare-table th{background:#0A1A2F;color:#fff;font-weight:700}
.compare-table th:first-child,.compare-table td:first-child{text-align:left;font-weight:600}
.compare-table .self td{background:#f0fbff}
.compare-table .yes{color:var(--green);font-weight:800}
.compare-table .no{color:#c4ced6}
.compare-table .tag-self{display:inline-block;background:linear-gradient(135deg,var(--cyan),var(--cyan-d));color:#04222e;font-weight:800;font-size:12px;padding:3px 10px;border-radius:999px}

/* 新闻 Tab */
.news-tabs{display:flex;justify-content:center;gap:10px;margin-bottom:34px;flex-wrap:wrap}
.news-tabs a{padding:10px 22px;border-radius:999px;font-weight:700;font-size:15px;color:var(--muted);background:#fff;border:1.5px solid var(--line)}
.news-tabs a.active{background:var(--navy);color:#fff;border-color:var(--navy)}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.news-card{background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:all .25s;display:flex;flex-direction:column}
.news-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.news-card .n-cover{height:170px;overflow:hidden;background:#eef4fa}
.news-card .n-cover img{width:100%;height:100%;object-fit:cover}
.news-card .n-body{padding:20px;flex:1;display:flex;flex-direction:column}
.news-card .n-meta{font-size:12.5px;color:var(--muted);margin-bottom:9px}
.news-card .n-cat{color:var(--cyan-d);font-weight:700}
.news-card h3{font-size:17px;margin-bottom:10px}
.news-card h3 a:hover{color:var(--cyan-d)}
.news-card .n-desc{color:var(--muted);font-size:14px;flex:1}
.news-card .n-more{margin-top:14px;color:var(--cyan-d);font-weight:700;font-size:14px}

/* 用户评论 */
.reviews-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.review-card{background:#fff;border-radius:var(--radius);padding:26px;box-shadow:var(--shadow)}
.review-card .stars{color:#f7b500;font-size:15px;letter-spacing:2px;margin-bottom:12px}
.review-card .rv-text{color:var(--text);font-size:15px;margin-bottom:16px}
.review-card .rv-user{display:flex;align-items:center;gap:12px}
.review-card .rv-ava{width:42px;height:42px;border-radius:50%;background:linear-gradient(135deg,#dff3ff,#cdeef8);display:flex;align-items:center;justify-content:center;font-weight:800;color:var(--cyan-d)}
.review-card .rv-name{font-weight:700;font-size:14px}
.review-card .rv-role{font-size:12.5px;color:var(--muted)}

/* 下载区 */
.download-section{background:linear-gradient(160deg,#0A1A2F,#0E2238);color:#fff}
.download-section .section-head h2{color:#fff}
.download-section .section-head p{color:#9fb4c8}
.dl-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
.dl-card{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:var(--radius);padding:24px 16px;text-align:center;transition:all .25s}
.dl-card:hover{background:rgba(255,255,255,.12);transform:translateY(-4px);border-color:var(--cyan)}
.dl-card .dl-icon{font-size:34px;margin-bottom:12px}
.dl-card h3{color:#fff;font-size:16px;margin-bottom:6px}
.dl-card p{color:#93a9bd;font-size:13px;margin-bottom:16px}
.dl-card a.btn{font-size:13px;padding:9px 20px}

/* FAQ */
.faq-list{max-width:820px;margin:0 auto}
.faq-item{background:#fff;border-radius:var(--radius);margin-bottom:14px;box-shadow:var(--shadow);overflow:hidden}
.faq-q{width:100%;background:none;border:none;text-align:left;font-size:17px;font-weight:700;color:var(--navy);padding:20px 24px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-family:inherit;list-style:none}
.faq-q::-webkit-details-marker{display:none}
.faq-q::marker{content:""}
.faq-q .plus{font-size:24px;color:var(--cyan-d);flex-shrink:0;margin-left:14px;transition:transform .2s}
.faq-a{display:none;padding:0 24px 22px;color:var(--muted);font-size:15px;line-height:1.85}
.faq-item[open] .faq-a{display:block}
.faq-item[open] .plus{transform:rotate(45deg)}
.faq-a ol{padding-left:20px;margin-top:8px}
.faq-a ol li{margin-bottom:8px}
.faq-a ol li b{color:var(--navy)}

/* 底部 CTA */
.cta-band{background:linear-gradient(135deg,var(--orange),var(--orange-d));color:#fff;text-align:center}
.cta-band h2{color:#fff;font-size:32px;margin-bottom:14px}
.cta-band p{color:#fff3e6;margin-bottom:26px;font-size:16px}
.cta-band .btn-primary{background:#fff;color:var(--orange-d)}

/* 页脚 */
.site-footer{background:#081120;color:#8ba0b4;padding:56px 0 0;font-size:14px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:34px;padding-bottom:40px}
.footer-brand .brand{color:#fff;margin-bottom:14px}
.footer-brand p{color:#7a90a6;font-size:13.5px;max-width:300px}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:16px}
.footer-col a{display:block;color:#8ba0b4;margin-bottom:11px}
.footer-col a:hover{color:var(--cyan)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:20px 0;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;color:#5f7488;font-size:13px}
.footer-bottom a{color:#8ba0b4}
.footer-bottom a:hover{color:var(--cyan)}

/* 面包屑 */
.breadcrumb{background:#fff;border-bottom:1px solid var(--line);padding:16px 0;font-size:14px;color:var(--muted)}
.breadcrumb a{color:var(--cyan-d)}
.breadcrumb a:hover{text-decoration:underline}
.breadcrumb span{color:var(--muted);margin:0 6px}
.breadcrumb .cur{color:var(--text);font-weight:600}

/* 内页头部 */
.page-hero{background:linear-gradient(160deg,#0A1A2F,#12304a);color:#fff;padding:60px 0;text-align:center}
.page-hero h1{color:#fff;font-size:36px;margin-bottom:12px}
.page-hero p{color:#9fb4c8;max-width:680px;margin:0 auto;font-size:16px}

/* 文章详情 */
.article-layout{display:grid;grid-template-columns:1fr 320px;gap:34px;align-items:start}
.article-main{background:#fff;border-radius:var(--radius);padding:40px;box-shadow:var(--shadow)}
.article-main h1{font-size:30px;margin:16px 0}
.article-meta{color:var(--muted);font-size:14px;margin-bottom:24px;display:flex;gap:16px;flex-wrap:wrap}
.article-body h2{font-size:23px;margin:30px 0 14px;padding-left:14px;border-left:4px solid var(--cyan)}
.article-body p{margin-bottom:18px;color:#2c3e4a;font-size:16.5px;line-height:1.9;text-align:justify}
.article-body figure{margin:24px 0}
.article-body figure img{border-radius:var(--radius);width:100%}
.article-body figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:8px}
.article-nav{display:flex;justify-content:space-between;margin-top:34px;padding-top:20px;border-top:1px solid var(--line);gap:12px;flex-wrap:wrap}
.article-nav a{color:var(--cyan-d);font-weight:600;font-size:14.5px}
.article-nav a:hover{text-decoration:underline}
.back-list{display:inline-block;margin-top:18px;color:var(--muted);font-weight:600}
.back-list:hover{color:var(--cyan-d)}

/* 侧边栏 */
.sidebar .sb-box{background:#fff;border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);margin-bottom:22px}
.sidebar h3{font-size:17px;margin-bottom:16px;padding-bottom:12px;border-bottom:2px solid var(--cyan)}
.sidebar .hot-item{display:flex;gap:12px;margin-bottom:14px;align-items:center}
.sidebar .hot-item img{width:64px;height:48px;border-radius:8px;object-fit:cover}
.sidebar .hot-item span{font-size:13.5px;font-weight:600;line-height:1.4}
.sidebar .hot-item:hover span{color:var(--cyan-d)}
.sidebar .cat-list a{display:flex;justify-content:space-between;padding:9px 0;border-bottom:1px dashed var(--line);font-size:14px;color:var(--text)}
.sidebar .cat-list a:hover{color:var(--cyan-d)}
.sidebar .cat-list .cnt{color:var(--muted);font-size:13px}

/* 相关阅读 */
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}

/* 下载详情页 */
.dl-page-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.dl-page-card{background:#fff;border-radius:var(--radius);padding:32px 24px;text-align:center;box-shadow:var(--shadow);transition:all .25s}
.dl-page-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.dl-page-card .dl-icon{font-size:40px;margin-bottom:16px}
.dl-page-card h3{font-size:20px;margin-bottom:8px}
.dl-page-card p{color:var(--muted);font-size:14px;margin-bottom:20px}
.dl-page-card .dl-meta{font-size:12.5px;color:var(--muted);margin-top:14px}

/* 404 */
.notfound{text-align:center;padding:100px 0}
.notfound .code{font-size:110px;font-weight:900;color:var(--cyan-d);line-height:1}
.notfound h1{font-size:30px;margin:20px 0 12px}
.notfound p{color:var(--muted);margin-bottom:28px}

@media(max-width:960px){
  .hero-inner{grid-template-columns:1fr;gap:40px}
  .features-grid,.news-grid,.reviews-grid,.dl-grid,.dl-page-grid,.related-grid{grid-template-columns:repeat(2,1fr)}
  .trust-grid{grid-template-columns:repeat(2,1fr)}
  .scene-grid{grid-template-columns:1fr}
  .article-layout{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .nav-links{display:none}
}
@media(max-width:560px){
  .features-grid,.news-grid,.reviews-grid,.dl-grid,.dl-page-grid,.related-grid{grid-template-columns:1fr}
  .hero h1{font-size:32px}
  .sim-body{grid-template-columns:1fr}
  .sim-side{flex-direction:row;flex-wrap:wrap}
}