/* ==========================================================================
   Lyric Matching LLZ — 官网样式
   配色：深灰底 + 琥珀金 #FFC247
   正文 17px / 桌面优先 / 手机自适应
   ========================================================================== */

:root{
  --bg:#0e1013;
  --bg-2:#13161a;
  --panel:#171b20;
  --panel-2:#1c2127;
  --line:#262d35;
  --line-2:#333c46;

  --txt:#eef2f6;
  --txt-2:#a9b4c0;
  --txt-3:#727e8b;

  --gold:#ffc247;
  --gold-dim:#c99427;
  --gold-glow:rgba(255,194,71,.16);
  --green:#3ddc84;
  --red:#ff5a52;

  --radius:14px;
  --radius-sm:9px;
  --wrap:1180px;

  --fs-body:17px;
  --fs-h1:64px;
  --fs-h2:38px;
  --fs-h3:21px;
  --fs-sm:15px;
  --fs-xs:13.5px;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--txt);
  font-family:"PingFang SC","Helvetica Neue",Helvetica,Arial,sans-serif;
  font-size:var(--fs-body);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:600}
p{margin:0}
ul{margin:0;padding:0;list-style:none}

.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 28px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* ------------------------------ 顶部导航 ------------------------------ */
.nav{
  position:sticky;top:0;z-index:50;
  background:rgba(14,16,19,.86);
  backdrop-filter:saturate(180%) blur(14px);
  -webkit-backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid var(--line);
}
.nav-in{display:flex;align-items:center;gap:28px;height:66px;max-width:var(--wrap);margin:0 auto;padding:0 28px}
.nav-logo{display:flex;align-items:center;gap:11px;flex:0 0 auto}
.nav-logo img{width:30px;height:30px;border-radius:8px}
.nav-logo b{font-size:16.5px;font-weight:600;letter-spacing:.2px;white-space:nowrap}
.nav-logo b em{font-style:normal;color:var(--gold);font-weight:600}
.nav-links{display:flex;gap:26px;margin-left:auto;font-size:15px;color:var(--txt-2)}
.nav-links a{transition:color .16s}
.nav-links a:hover{color:var(--gold)}

.lang{
  display:flex;align-items:center;gap:2px;flex:0 0 auto;
  border:1px solid var(--line-2);border-radius:99px;padding:3px;background:var(--panel);
}
.lang button{
  border:0;background:transparent;color:var(--txt-3);
  font:inherit;font-size:13.5px;font-weight:600;cursor:pointer;
  padding:4px 13px;border-radius:99px;transition:.16s;
}
.lang button[aria-pressed="true"]{background:var(--gold);color:#1a1408}
.lang button:hover:not([aria-pressed="true"]){color:var(--txt)}

/* ------------------------------ 通用块 ------------------------------ */
section{padding:96px 0;border-top:1px solid var(--line)}
section:first-of-type{border-top:0}
.sec-head{margin-bottom:44px;max-width:760px}
.eyebrow{
  display:inline-block;font-size:var(--fs-xs);letter-spacing:2.4px;
  color:var(--gold);font-weight:600;margin-bottom:14px;text-transform:uppercase;
}
.sec-head h2{font-size:var(--fs-h2);letter-spacing:-.3px}
.sec-head .sub{color:var(--txt-2);font-size:var(--fs-body);margin-top:14px}

/* ------------------------------ 首屏 ------------------------------ */
.hero{
  padding:88px 0 84px;border-top:0;
  background:
    radial-gradient(120% 84% at 78% 0%,rgba(255,194,71,.10) 0%,rgba(255,194,71,0) 58%),
    radial-gradient(90% 70% at 8% 10%,rgba(255,194,71,.05) 0%,rgba(255,194,71,0) 60%),
    var(--bg);
}
.hero-in{display:grid;grid-template-columns:minmax(0,.92fr) minmax(0,1.08fr);gap:56px;align-items:center}
.hero-badge{
  display:inline-flex;align-items:center;gap:9px;
  border:1px solid var(--line-2);background:var(--panel);
  border-radius:99px;padding:6px 15px;font-size:var(--fs-xs);color:var(--txt-2);margin-bottom:22px;
}
.hero-badge i{width:8px;height:8px;border-radius:50%;background:var(--green);display:block}
.hero h1{font-size:var(--fs-h1);letter-spacing:-1.4px;line-height:1.1;font-weight:700}
.hero h1 em{font-style:normal;color:var(--gold)}
.hero .lead{font-size:22px;color:var(--txt-2);margin-top:22px;line-height:1.62;max-width:520px}
.hero .lead b{color:var(--txt);font-weight:600}
.cta{display:flex;gap:14px;margin-top:34px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  font-size:16px;font-weight:600;padding:14px 30px;border-radius:var(--radius-sm);
  border:1px solid transparent;cursor:pointer;font-family:inherit;transition:.18s;
}
.btn-gold{background:var(--gold);color:#1a1408;box-shadow:0 6px 26px -8px var(--gold-glow)}
.btn-gold:hover{background:#ffd06b;transform:translateY(-1px)}
.btn-ghost{border-color:var(--line-2);color:var(--txt-2);background:var(--panel)}
.btn-ghost:hover{border-color:var(--gold);color:var(--gold)}
.hero-meta{display:flex;gap:22px;margin-top:28px;font-size:var(--fs-sm);color:var(--txt-3);flex-wrap:wrap}
.hero-meta span{display:flex;align-items:center;gap:7px}
.hero-meta svg{flex:0 0 auto}

.shot{
  border:1px solid var(--line-2);border-radius:var(--radius);overflow:hidden;
  background:var(--panel);box-shadow:0 28px 70px -30px rgba(0,0,0,.9);
}
.shot-bar{display:flex;align-items:center;gap:7px;padding:11px 14px;border-bottom:1px solid var(--line);background:var(--panel-2)}
.shot-bar i{width:11px;height:11px;border-radius:50%;background:#3a444f;display:block}
.shot-bar span{margin-left:9px;font-size:var(--fs-xs);color:var(--txt-3)}
.shot img{width:100%}
.shot figcaption{padding:11px 15px;font-size:var(--fs-xs);color:var(--txt-3);border-top:1px solid var(--line)}

/* ------------------------------ 痛点 ------------------------------ */
.pain{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.pain-card{border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);padding:26px 24px}
.pain-card .bad{display:flex;align-items:flex-start;gap:10px;color:var(--txt-2);font-size:var(--fs-sm);line-height:1.6}
.pain-card .bad svg{flex:0 0 auto;margin-top:4px}
.pain-card .arrow{margin:16px 0;color:var(--txt-3);font-size:var(--fs-xs);letter-spacing:2px}
.pain-card .good{color:var(--txt);font-size:16px;font-weight:500;line-height:1.65}
.pain-card .good b{color:var(--gold);font-weight:600}

/* ------------------------------ 功能 ------------------------------ */
.feat{display:flex;flex-direction:column;gap:78px}
.feat-row{display:grid;grid-template-columns:minmax(0,.78fr) minmax(0,1.22fr);gap:52px;align-items:center}
.feat-row:nth-child(even) .feat-txt{order:2}
.feat-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:10px;background:var(--gold-glow);
  color:var(--gold);font-size:15px;font-weight:700;margin-bottom:16px;
}
.feat-txt h3{font-size:26px;letter-spacing:-.2px;margin-bottom:14px}
.feat-txt p{color:var(--txt-2);font-size:16.5px}
.feat-txt ul{margin-top:18px;display:flex;flex-direction:column;gap:10px}
.feat-txt li{display:flex;gap:11px;font-size:15.5px;color:var(--txt-2);line-height:1.6}
.feat-txt li::before{content:"";flex:0 0 auto;width:6px;height:6px;border-radius:50%;background:var(--gold);margin-top:10px}
.feat-txt li b{color:var(--txt);font-weight:600}

/* 功能 3 的图和数据流示意 */
.feat-visual{display:flex;flex-direction:column;gap:16px}
.lamps{
  display:flex;align-items:center;gap:14px;flex-wrap:wrap;
  border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);padding:18px 22px;
}
.lamp{
  display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:600;
  color:var(--txt-2);border:1px solid var(--line-2);border-radius:99px;padding:6px 15px;
}
.lamp i{width:9px;height:9px;border-radius:50%;display:block;flex:0 0 auto}
.lamp i.on{background:var(--green);box-shadow:0 0 10px rgba(61,220,132,.65)}
.lamp i.off{background:#3a444f}
.lamps-note{font-size:14px;color:var(--txt-3);margin-left:auto}

.diagram{
  display:flex;align-items:stretch;gap:10px;flex-wrap:wrap;
  border:1px solid var(--line);border-radius:var(--radius);background:var(--bg-2);padding:22px;
}
.dg-node{
  flex:1 1 120px;min-width:110px;border:1px solid var(--line-2);border-radius:var(--radius-sm);
  background:var(--panel);padding:14px 12px;text-align:center;display:flex;flex-direction:column;
  gap:5px;justify-content:center;
}
.dg-node b{font-size:15px;font-weight:600;color:var(--txt);letter-spacing:.2px}
.dg-node span{font-size:12.5px;color:var(--txt-3);line-height:1.4}
.dg-node.hot{border-color:var(--gold-dim);background:linear-gradient(180deg,rgba(255,194,71,.10),rgba(255,194,71,.02))}
.dg-node.hot b{color:var(--gold)}
.dg-arw{display:flex;align-items:center;color:var(--gold-dim);font-size:17px;flex:0 0 auto}
.diagram-legend{font-size:13.5px;color:var(--txt-3);line-height:1.6;padding-left:2px}

/* ------------------------------ 表格 ------------------------------ */
.tbl-wrap{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--panel)}
table{width:100%;border-collapse:collapse;font-size:15.5px}
th,td{text-align:left;padding:16px 20px;border-bottom:1px solid var(--line);vertical-align:top}
th{background:var(--panel-2);color:var(--txt-3);font-size:var(--fs-xs);letter-spacing:1.2px;font-weight:600;text-transform:uppercase}
tbody tr:last-child td{border-bottom:0}
tbody tr:hover{background:rgba(255,255,255,.016)}
td strong{color:var(--txt);font-weight:600}
td .mono{font-family:"SF Mono",ui-monospace,Menlo,monospace;font-size:13.5px;color:var(--txt-2)}
.mono2{font-family:"SF Mono",ui-monospace,Menlo,monospace;font-size:14.5px;color:var(--gold);background:rgba(255,194,71,.08);padding:1px 6px;border-radius:5px}
.tag{
  display:inline-block;font-size:12.5px;font-weight:600;padding:3px 10px;border-radius:6px;
  background:var(--gold-glow);color:var(--gold);white-space:nowrap;
}
.tag.gray{background:#232a31;color:var(--txt-2)}
.tag.green{background:rgba(61,220,132,.13);color:var(--green)}
.tag.red{background:rgba(255,90,82,.13);color:var(--red)}

/* -------- 六源卡片 -------- */
.sources{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:26px}
.src{border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);padding:22px}
.src h4{font-size:17.5px;margin-bottom:7px;display:flex;align-items:center;gap:9px;flex-wrap:wrap}
.src p{font-size:var(--fs-sm);color:var(--txt-2);line-height:1.6}

/* ------------------------------ 录音流程 ------------------------------ */
.flow{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;counter-reset:step}
.flow-step{
  position:relative;border:1px solid var(--line);border-radius:var(--radius);
  background:var(--panel);padding:24px 22px 22px;
}
.flow-step::before{
  counter-increment:step;content:counter(step);
  position:absolute;top:-13px;left:22px;
  width:27px;height:27px;border-radius:9px;background:var(--gold);color:#1a1408;
  font-size:13.5px;font-weight:700;display:flex;align-items:center;justify-content:center;
}
.flow-step h4{font-size:16.5px;margin:8px 0 8px}
.flow-step p{font-size:var(--fs-sm);color:var(--txt-2);line-height:1.6}
.flow-note{
  margin-top:22px;border:1px solid var(--line-2);border-left:3px solid var(--gold);
  border-radius:var(--radius-sm);background:var(--panel);padding:18px 22px;
  font-size:15.5px;color:var(--txt-2);
}
.flow-note b{color:var(--txt)}

/* ------------------------------ 安装 ------------------------------ */
.install{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.inst{border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);padding:26px 24px}
.inst .k{font-size:var(--fs-xs);letter-spacing:2px;color:var(--gold);font-weight:600;margin-bottom:12px}
.inst h4{font-size:18px;margin-bottom:10px}
.inst p{font-size:15.5px;color:var(--txt-2);line-height:1.65}
.req{margin-top:34px;display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.req-item{border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--bg-2);padding:18px 20px}
.req-item .l{font-size:var(--fs-xs);color:var(--txt-3);letter-spacing:1px;margin-bottom:6px}
.req-item .v{font-size:16px;font-weight:600}

/* ------------------------------ 作者 ------------------------------ */
.author{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:48px;align-items:center}
.author h2{font-size:var(--fs-h2)}
.author p{color:var(--txt-2);margin-top:16px;font-size:16.5px}
.contacts{display:flex;flex-direction:column;gap:12px;margin-top:26px}
.contact{
  display:flex;align-items:center;gap:14px;border:1px solid var(--line);
  border-radius:var(--radius-sm);background:var(--panel);padding:15px 20px;transition:.18s;
}
.contact:hover{border-color:var(--gold)}
.contact .ico{width:34px;height:34px;border-radius:9px;background:var(--gold-glow);display:flex;align-items:center;justify-content:center;flex:0 0 auto}
.contact .t1{font-size:var(--fs-xs);color:var(--txt-3)}
.contact .t2{font-size:16px;font-weight:600}

.author-art{
  border:1px solid var(--line-2);border-radius:var(--radius);background:
    radial-gradient(90% 80% at 50% 0%,rgba(255,194,71,.10),rgba(255,194,71,0) 62%),var(--panel);
  padding:52px 40px;text-align:center;
}
.author-art img{width:132px;height:132px;border-radius:30px;margin:0 auto 26px;box-shadow:0 20px 50px -18px rgba(0,0,0,.9)}
.author-art .n{font-size:22px;font-weight:700}
.author-art .v{color:var(--gold);font-size:15px;font-weight:600;margin-top:6px;letter-spacing:.4px}
.author-art .d{color:var(--txt-3);font-size:var(--fs-sm);margin-top:14px;line-height:1.6}

/* ------------------------------ 试用与授权 ------------------------------ */
.license-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.lic{border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);padding:22px 20px}
.lic-k{font-size:var(--fs-xs);color:var(--txt-3);letter-spacing:1.4px;margin-bottom:8px}
.lic-v{font-size:23px;font-weight:700;color:var(--gold);letter-spacing:-.3px;margin-bottom:9px}
.lic-d{font-size:14.5px;color:var(--txt-2);line-height:1.6}

.author-two{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:40px;align-items:start}
.lic-how h4{font-size:20px;margin-bottom:18px}
.steps{list-style:none;counter-reset:s;display:flex;flex-direction:column;gap:14px;padding:0;margin:0}
.steps li{counter-increment:s;position:relative;padding-left:40px;font-size:15.5px;color:var(--txt-2);line-height:1.6}
.steps li::before{
  content:counter(s);position:absolute;left:0;top:-1px;
  width:26px;height:26px;border-radius:8px;background:var(--gold-glow);color:var(--gold);
  font-size:13px;font-weight:700;display:flex;align-items:center;justify-content:center;
}

/* ------------------------------ 页脚 ------------------------------ */
footer{border-top:1px solid var(--line);padding:44px 0 54px;background:var(--bg-2)}
.foot-in{display:flex;align-items:center;gap:20px;flex-wrap:wrap;font-size:var(--fs-sm);color:var(--txt-3)}
.foot-in .sp{margin-left:auto;display:flex;gap:20px;align-items:center}
.foot-in a:hover{color:var(--gold)}

/* ------------------------------ 手机 ------------------------------ */
@media (max-width:960px){
  :root{--fs-h1:40px;--fs-h2:29px;--fs-body:16.5px}
  .nav-links{display:none}
  .hero{padding:56px 0 60px}
  .hero-in,.feat-row,.author{grid-template-columns:1fr;gap:36px}
  .feat-row:nth-child(even) .feat-txt{order:0}
  .pain,.sources,.flow,.install,.req{grid-template-columns:1fr}
  .license-grid{grid-template-columns:repeat(2,1fr)}
  .author-two{grid-template-columns:1fr;gap:28px}
  .req{grid-template-columns:repeat(2,1fr)}
  section{padding:64px 0}
  .feat{gap:56px}
  .hero .lead{font-size:18px;margin-top:16px}
  .cta{margin-top:26px}
  .cta .btn{flex:1 1 auto}
  .wrap,.nav-in{padding:0 20px}
  .author-art{padding:38px 26px}
  .tbl-wrap{overflow-x:auto}
  table{min-width:560px}
}
@media (max-width:520px){
  .req{grid-template-columns:1fr}
  .hero-meta{gap:14px;font-size:14px}
}

/* ==========================================================================
   双语：两套文案都写在 HTML 里，靠 html[data-lang] 显示其中一套
   注意：必须用 !important 兜底 —— 否则 .hero-meta span{display:flex}
        这类常规规则会按优先级压过来，导致中英文同时显示。
   ========================================================================== */
.zh,.en{display:none}
html[data-lang="zh"] .zh,html[data-lang="en"] .en{display:inline !important}
html[data-lang="zh"] .en,html[data-lang="en"] .zh{display:none !important}

/* 标题、首屏副标题里的双语要占整行，否则 <br> 排版会怪 */
html[data-lang="zh"] h1>.zh,html[data-lang="en"] h1>.en,
html[data-lang="zh"] .lead>.zh,html[data-lang="en"] .lead>.en{display:block !important}

/* 页脚的两个双语片段各占一行 */
html[data-lang="zh"] footer>.wrap>.zh,html[data-lang="en"] footer>.wrap>.en{display:inline !important}

/* 英文模式排版微调 */
html[data-lang="en"] body{font-family:"Helvetica Neue",Helvetica,-apple-system,Arial,sans-serif}
html[data-lang="en"] .hero h1{letter-spacing:-1.6px}
html[data-lang="en"] .nav-logo b{font-size:16px}

/* 竖版截图（布局调整器）不放大、不拉高，居中显示 */
.feat-row .shot.narrow{max-width:430px;margin:0 auto !important}
.feat-row .shot.narrow img{width:100%;max-height:620px;object-fit:cover;object-position:top}