:root{
  --primary:#e60026;
  --primary-dark:#c4001f;
  --primary-soft:#fff1f3;
  --ink:#1c1c1e;
  --text:#33343a;
  --muted:#6b6c72;
  --bg:#f7f8fa;
  --card:#ffffff;
  --line:#e9eaee;
  --gold:#f7b500;
  --shadow-sm:0 1px 2px rgba(20,20,30,.05),0 1px 3px rgba(20,20,30,.06);
  --shadow-md:0 6px 18px rgba(20,20,30,.08),0 2px 6px rgba(20,20,30,.05);
  --shadow-lg:0 18px 44px rgba(20,20,30,.14);
  --radius:16px;
  --radius-sm:10px;
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font);color:var(--text);background:var(--bg);line-height:1.75;font-size:16px}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul,ol{list-style:none}
.container{max-width:1180px;margin:0 auto;padding:0 22px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

/* ===== 按钮（全部 <a>）===== */
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 26px;border-radius:999px;font-weight:600;font-size:15px;transition:.22s;border:1px solid transparent;cursor:pointer;line-height:1.2}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 8px 20px rgba(230,0,38,.28)}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 12px 26px rgba(230,0,38,.34)}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary)}
.btn-light{background:#fff;color:var(--primary)}
.btn-dark{background:var(--ink);color:#fff}
.btn-sm{padding:8px 18px;font-size:14px}
.btn-lg{padding:15px 34px;font-size:17px}

/* ===== 顶栏 ===== */
.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:68px}
.brand{display:flex;align-items:center;gap:10px}
.brand img{width:32px;height:32px;border-radius:8px}
.brand-name{font-size:19px;font-weight:800;color:var(--ink);letter-spacing:.5px}
.brand-name em{color:var(--primary);font-style:normal}
.nav{display:flex;align-items:center;gap:6px}
.nav a{padding:8px 14px;border-radius:8px;font-size:15px;font-weight:500;color:var(--text);transition:.18s}
.nav a:hover{color:var(--primary);background:var(--primary-soft)}
.nav a.active{color:var(--primary);font-weight:700}
.header-cta{margin-left:6px}
.nav-toggle{display:none}

/* ===== Hero + 客户端模拟器 ===== */
.hero{position:relative;overflow:hidden;background:linear-gradient(135deg,#2b0010 0%,#5b0316 45%,#a00f2b 100%);color:#fff;padding:64px 0 90px}
.hero::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 80% 20%,rgba(255,255,255,.10),transparent 40%),radial-gradient(circle at 10% 90%,rgba(247,181,0,.14),transparent 42%)}
.hero-inner{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.25);padding:6px 16px;border-radius:999px;font-size:13px;font-weight:600;letter-spacing:.5px}
.hero h1{font-size:46px;line-height:1.2;font-weight:900;margin:22px 0 18px;letter-spacing:.5px}
.hero h1 .hl{color:#ffd7dc}
.hero-desc{font-size:17px;color:rgba(255,255,255,.86);max-width:520px;margin-bottom:28px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:26px}
.hero-meta{display:flex;flex-wrap:wrap;gap:26px;font-size:14px;color:rgba(255,255,255,.78)}
.hero-meta b{display:block;font-size:22px;color:#fff;font-weight:800}
.hero-meta span{font-size:13px}

/* 客户端模拟器 */
.sim-wrap{position:relative}
.sim{background:#17171a;border-radius:14px;box-shadow:0 30px 70px rgba(0,0,0,.45),0 0 0 1px rgba(255,255,255,.08);overflow:hidden;font-size:13px;color:#d7d8dd}
.sim-top{display:flex;align-items:center;gap:8px;padding:11px 14px;background:#1f2024;border-bottom:1px solid #2b2c31}
.sim-dot{width:12px;height:12px;border-radius:50%}
.sim-dot.r{background:#ff5f57}.sim-dot.y{background:#febc2e}.sim-dot.g{background:#28c840}
.sim-title{margin-left:10px;color:#8b8d94;font-size:12px;letter-spacing:.5px}
.sim-body{display:grid;grid-template-columns:150px 1fr;min-height:340px}
.sim-side{background:#212226;padding:16px 12px;border-right:1px solid #2b2c31}
.sim-side .s-logo{display:flex;align-items:center;gap:6px;color:#fff;font-weight:700;margin-bottom:18px;font-size:14px}
.sim-side .s-logo .n{width:20px;height:20px;background:var(--primary);border-radius:6px;display:inline-flex;align-items:center;justify-content:center;font-size:11px}
.sim-nav li{padding:8px 10px;border-radius:8px;margin-bottom:4px;color:#a7a9b0;cursor:pointer;display:flex;align-items:center;gap:8px}
.sim-nav li.on{background:var(--primary);color:#fff}
.sim-nav li i{font-style:normal;font-size:13px;opacity:.9}
.sim-main{padding:16px}
.sim-search{background:#2b2c31;border-radius:20px;padding:7px 14px;color:#7f8187;margin-bottom:14px;font-size:12px}
.sim-banner{height:78px;border-radius:10px;background:linear-gradient(120deg,#e60026,#ff6a3d);padding:14px 16px;color:#fff;margin-bottom:14px}
.sim-banner b{font-size:15px}
.sim-banner p{font-size:11px;opacity:.85;margin-top:2px}
.sim-song{display:flex;align-items:center;gap:10px;padding:8px;border-radius:8px;margin-bottom:4px}
.sim-song:hover,.sim-song.on{background:#2b2c31}
.sim-song.on{box-shadow:inset 3px 0 0 var(--primary)}
.sim-song .idx{width:18px;color:#7f8187;text-align:center;font-size:12px}
.sim-song .ttl{flex:1}
.sim-song .ttl b{display:block;color:#e8e9ec;font-weight:600;font-size:13px}
.sim-song .ttl span{color:#7f8187;font-size:11px}
.sim-song .wave{color:var(--primary);font-size:13px}
.sim-play{display:flex;align-items:center;gap:12px;padding:12px 14px;background:#1f2024;border-top:1px solid #2b2c31;grid-column:1/-1}
.sim-cover{width:42px;height:42px;border-radius:8px;background:linear-gradient(135deg,#e60026,#ffb199);flex:none}
.sim-play .p-info{flex:1;min-width:0}
.sim-play .p-info b{display:block;color:#fff;font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.sim-play .p-info span{color:#8b8d94;font-size:11px}
.sim-ctrl{display:flex;align-items:center;gap:12px;color:#d7d8dd}
.sim-ctrl .c{width:28px;height:28px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;font-size:13px}
.sim-ctrl .c.play{background:var(--primary);color:#fff;width:34px;height:34px;font-size:14px}
.sim-bar{flex:1;height:4px;background:#3a3b40;border-radius:4px;position:relative;max-width:130px}
.sim-bar::after{content:"";position:absolute;left:0;top:0;width:62%;height:100%;background:var(--primary);border-radius:4px}

/* ===== 板块通用 ===== */
.section{padding:76px 0}
.section.alt{background:#fff}
.sec-head{max-width:720px;margin:0 auto 46px;text-align:center}
.sec-head .kicker{display:inline-block;color:var(--primary);font-weight:700;font-size:13px;letter-spacing:2px;text-transform:uppercase;margin-bottom:10px}
.sec-head h2{font-size:34px;color:var(--ink);font-weight:900;letter-spacing:.3px;line-height:1.25}
.sec-head p{color:var(--muted);margin-top:12px;font-size:16px}

/* 公告区 */
.notice-bar{background:#fff;border-bottom:1px solid var(--line)}
.notice-inner{display:flex;align-items:center;gap:14px;padding:14px 0;font-size:14px}
.notice-tag{background:var(--primary);color:#fff;padding:3px 12px;border-radius:6px;font-weight:700;font-size:12px;flex:none}
.notice-txt{color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.notice-txt a:hover{color:var(--primary)}
.notice-more{color:var(--muted);flex:none;font-size:13px}

/* 核心功能 6 项 */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.feat{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px 26px;transition:.25s;position:relative;overflow:hidden}
.feat:hover{transform:translateY(-5px);box-shadow:var(--shadow-md);border-color:transparent}
.feat::after{content:"";position:absolute;top:0;left:0;width:100%;height:3px;background:linear-gradient(90deg,var(--primary),#ff8a4d);opacity:0;transition:.25s}
.feat:hover::after{opacity:1}
.feat-ico{width:52px;height:52px;border-radius:14px;background:var(--primary-soft);display:flex;align-items:center;justify-content:center;font-size:26px;margin-bottom:18px}
.feat h3{font-size:19px;color:var(--ink);margin-bottom:10px;font-weight:800}
.feat p{color:var(--muted);font-size:14.5px}
.feat .more{display:inline-block;margin-top:14px;color:var(--primary);font-weight:600;font-size:14px}
.feat .more:hover{text-decoration:underline}

/* 卖点 3 条 */
.sell-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.sell{background:linear-gradient(160deg,#fff,#fff7f8);border:1px solid var(--line);border-radius:var(--radius);padding:34px 28px;text-align:center}
.sell .num{font-size:44px;font-weight:900;color:var(--primary);opacity:.16;line-height:1}
.sell h3{font-size:20px;color:var(--ink);margin:10px 0 12px;font-weight:800}
.sell p{color:var(--muted);font-size:14.5px}

/* 对比表 */
.cmp-scroll{overflow-x:auto;border-radius:var(--radius);border:1px solid var(--line)}
.cmp-table{width:100%;border-collapse:collapse;background:#fff;min-width:640px}
.cmp-table th,.cmp-table td{padding:15px 18px;text-align:left;font-size:14.5px;border-bottom:1px solid var(--line)}
.cmp-table thead th{background:#fafafb;font-weight:700;color:var(--ink)}
.cmp-table tbody tr:last-child td{border-bottom:none}
.cmp-table td.yes{color:#16a34a;font-weight:700}
.cmp-table td.no{color:#b0b1b7}
.cmp-table .self{background:var(--primary-soft)}
.cmp-table .self td:first-child{font-weight:800;color:var(--primary)}

/* 新闻 3 Tab */
.tabs input{display:none}
.tab-labels{display:flex;gap:6px;background:#eceef1;padding:5px;border-radius:12px;max-width:max-content;margin:0 auto 32px}
.tab-labels label{padding:9px 22px;border-radius:9px;font-size:14.5px;font-weight:600;color:var(--muted);cursor:pointer;transition:.2s}
#tab1:checked~.tab-labels label[for=tab1],
#tab2:checked~.tab-labels label[for=tab2],
#tab3:checked~.tab-labels label[for=tab3]{background:#fff;color:var(--primary);box-shadow:var(--shadow-sm)}
.tab-panels .panel{display:none}
#tab1:checked~.tab-panels .p1,
#tab2:checked~.tab-panels .p2,
#tab3:checked~.tab-panels .p3{display:grid}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.news-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.25s}
.news-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-md)}
.news-card img{width:100%;height:170px;object-fit:cover}
.news-card .nc-body{padding:18px}
.news-card .nc-tag{font-size:12px;color:var(--primary);font-weight:700}
.news-card h3{font-size:16.5px;color:var(--ink);margin:8px 0;line-height:1.45;font-weight:700}
.news-card h3 a:hover{color:var(--primary)}
.news-card .nc-meta{font-size:12.5px;color:var(--muted)}

/* 用户评论 */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.review{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.review .stars{color:var(--gold);font-size:15px;margin-bottom:12px;letter-spacing:2px}
.review p{color:var(--text);font-size:14.5px;margin-bottom:16px}
.review .who{display:flex;align-items:center;gap:10px}
.review .who .av{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,#e60026,#ff8a4d);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700}
.review .who b{display:block;color:var(--ink);font-size:14px}
.review .who span{color:var(--muted);font-size:12px}

/* 下载 5 平台 */
.dl-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
.dl{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px 16px;text-align:center;transition:.25s}
.dl:hover{transform:translateY(-5px);box-shadow:var(--shadow-md);border-color:transparent}
.dl .ico{width:56px;height:56px;margin:0 auto 14px;border-radius:16px;background:var(--primary-soft);display:flex;align-items:center;justify-content:center;font-size:28px}
.dl b{display:block;color:var(--ink);font-size:15.5px;margin-bottom:6px}
.dl span{display:block;color:var(--muted);font-size:12.5px;margin-bottom:14px}
.dl a{display:inline-block;background:var(--primary);color:#fff;font-size:13px;padding:7px 20px;border-radius:999px;font-weight:600}
.dl a:hover{background:var(--primary-dark)}

/* 信任背书 */
.trust{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.trust-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);padding:22px;text-align:center}
.trust-item b{display:block;font-size:30px;font-weight:900;color:var(--primary)}
.trust-item span{color:var(--muted);font-size:13.5px}

/* 应用场景 */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.scene{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:.22s}
.scene:hover{border-color:var(--primary)}
.scene .ico{font-size:30px;margin-bottom:12px}
.scene h3{font-size:17.5px;color:var(--ink);margin-bottom:8px;font-weight:800}
.scene p{color:var(--muted);font-size:14px}

/* FAQ */
.faq-list{max-width:820px;margin:0 auto}
.faq{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-sm);margin-bottom:14px;overflow:hidden}
.faq summary{cursor:pointer;padding:20px 24px;font-weight:700;color:var(--ink);list-style:none;display:flex;align-items:center;justify-content:space-between;gap:16px;font-size:16.5px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:24px;color:var(--primary);font-weight:400;flex:none}
.faq[open] summary::after{content:"−"}
.faq[open] summary{color:var(--primary)}
.faq .faq-body{padding:0 24px 22px;color:var(--text);font-size:15px}
.faq .faq-body h4{color:var(--ink);margin:14px 0 6px;font-size:15.5px}
.faq .step{margin:0 0 12px;padding:12px 16px;background:var(--primary-soft);border-radius:8px;font-size:14.5px}
.faq .step b{color:var(--primary);margin-right:6px}

/* CTA + 页脚 */
.cta{background:linear-gradient(135deg,#2b0010,#a00f2b);color:#fff;border-radius:22px;padding:56px 48px;text-align:center;position:relative;overflow:hidden}
.cta h2{font-size:32px;font-weight:900;margin-bottom:12px}
.cta p{color:rgba(255,255,255,.85);max-width:560px;margin:0 auto 26px}
.footer{background:#161619;color:#9a9ba1;padding:60px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:36px;padding-bottom:40px}
.footer .brand{color:#fff;margin-bottom:16px}
.footer .brand-name{color:#fff}
.footer-about{font-size:14px;line-height:1.8;color:#7f8086}
.footer h4{color:#fff;font-size:15px;margin-bottom:16px;font-weight:700}
.footer ul li{margin-bottom:10px}
.footer ul a{font-size:14px;color:#9a9ba1}
.footer ul a:hover{color:var(--primary)}
.footer-bottom{border-top:1px solid #26262a;padding:20px 0;font-size:13px;color:#6f7076;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}
.footer-bottom a{color:#9a9ba1}
.footer-bottom a:hover{color:var(--primary)}

/* ===== 面包屑 ===== */
.breadcrumb{background:#fff;border-bottom:1px solid var(--line);padding:14px 0;font-size:13.5px;color:var(--muted)}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{margin:0 8px;color:#c4c5ca}

/* ===== 内页 hero ===== */
.page-hero{background:linear-gradient(135deg,#2b0010,#a00f2b);color:#fff;padding:56px 0 64px;text-align:center}
.page-hero h1{font-size:38px;font-weight:900}
.page-hero p{color:rgba(255,255,255,.85);max-width:640px;margin:14px auto 0}

/* ===== 文章详情 ===== */
.article-layout{display:grid;grid-template-columns:1fr 300px;gap:36px;align-items:start}
.article-main{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:40px 44px}
.article-main h1{font-size:30px;line-height:1.4;color:var(--ink);font-weight:900;margin:14px 0}
.article-meta{display:flex;flex-wrap:wrap;gap:16px;font-size:13.5px;color:var(--muted);padding-bottom:20px;border-bottom:1px solid var(--line);margin-bottom:24px}
.article-main .lead{font-size:17px;color:var(--ink);font-weight:600;background:var(--primary-soft);padding:18px 20px;border-radius:10px;border-left:4px solid var(--primary);margin-bottom:26px}
.article-body{font-size:16px;color:var(--text)}
.article-body p{margin-bottom:18px;text-align:justify}
.article-body h2{font-size:22px;color:var(--ink);font-weight:800;margin:30px 0 14px;padding-left:14px;border-left:4px solid var(--primary)}
.article-body img{width:100%;border-radius:12px;margin:20px 0;border:1px solid var(--line)}
.article-body figcaption{font-size:13px;color:var(--muted);text-align:center;margin:-12px 0 20px}
.article-body blockquote{border-left:3px solid var(--primary);background:#fafafa;padding:14px 18px;margin:18px 0;color:#555;font-size:14.5px;border-radius:0 8px 8px 0}
.article-pager{display:flex;justify-content:space-between;gap:14px;margin-top:34px;padding-top:22px;border-top:1px solid var(--line);font-size:14.5px}
.article-pager a{color:var(--primary);font-weight:600}
.article-pager a:hover{text-decoration:underline}
.article-pager .disabled{color:#c0c1c6}

/* 侧栏 */
.aside-widget{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin-bottom:22px}
.aside-widget h3{font-size:16px;color:var(--ink);margin-bottom:16px;font-weight:800;padding-bottom:10px;border-bottom:2px solid var(--primary-soft)}
.hot-list li{display:flex;gap:12px;padding:10px 0;border-bottom:1px dashed var(--line)}
.hot-list li:last-child{border-bottom:none}
.hot-list .rnk{font-size:20px;font-weight:900;color:#e0e1e5;width:26px;flex:none;font-style:italic}
.hot-list li:first-child .rnk{color:var(--primary)}
.hot-list a{font-size:14px;color:var(--text);line-height:1.5}
.hot-list a:hover{color:var(--primary)}
.cat-list li{border-bottom:1px dashed var(--line)}
.cat-list a{display:flex;justify-content:space-between;padding:11px 0;font-size:14.5px}
.cat-list a:hover{color:var(--primary)}
.cat-list .cnt{color:var(--muted);font-size:12.5px}

/* 评论 */
.comments{margin-top:36px}
.comments h3{font-size:18px;color:var(--ink);margin-bottom:18px;font-weight:800}
.comment{display:flex;gap:14px;padding:16px 0;border-bottom:1px solid var(--line)}
.comment .av{width:42px;height:42px;border-radius:50%;flex:none;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700}
.comment b{color:var(--ink);font-size:14px}
.comment .c-meta{font-size:12px;color:var(--muted)}
.comment p{font-size:14.5px;margin-top:6px}

/* 相关阅读 */
.related{margin-top:36px}
.related h3{font-size:18px;color:var(--ink);margin-bottom:18px;font-weight:800}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}

/* ===== 新闻列表页 ===== */
.news-list{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.news-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column}
.news-item img{width:100%;height:190px;object-fit:cover}
.news-item .ni-body{padding:20px;display:flex;flex-direction:column;flex:1}
.news-item .ni-tag{font-size:12px;color:var(--primary);font-weight:700}
.news-item h3{font-size:17px;color:var(--ink);margin:8px 0;line-height:1.45}
.news-item h3 a:hover{color:var(--primary)}
.news-item p{color:var(--muted);font-size:14px;flex:1}
.news-item .ni-meta{font-size:12.5px;color:var(--muted);margin-top:12px}

/* 响应式 */
@media(max-width:1024px){
  .hero-inner{grid-template-columns:1fr;gap:40px}
  .feat-grid,.sell-grid,.news-grid,.review-grid,.dl-grid,.scene-grid{grid-template-columns:repeat(2,1fr)}
  .trust{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .article-layout{grid-template-columns:1fr}
  .related-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:640px){
  .nav{display:none}
  .nav-toggle{display:block}
  .hero h1{font-size:32px}
  .sim-body{grid-template-columns:1fr}
  .sim-side{display:none}
  .feat-grid,.sell-grid,.news-grid,.review-grid,.dl-grid,.scene-grid,.trust,.news-list{grid-template-columns:1fr}
  .article-main{padding:24px 20px}
  .footer-grid{grid-template-columns:1fr}
  .sec-head h2{font-size:26px}
}