:root{
  --shell-gutter:16px;
  /* app 落地页那套：纯白底 + 黑色块 + 电光蓝。现有各站没人用蓝作强调色。*/
  --paper:#ffffff;--wash:#f2f4f8;--block:#0f1115;--block2:#1a1d24;
  --ink:#0f1115;--muted:#4d5563;--dim:#646c7a;
  --blue:#1a56db;--blue-soft:#e8efff;--blue-line:#c3d5ff;
  --line:rgba(15,17,21,.1);--line2:rgba(15,17,21,.2);
  --brand-1:#FFC53D;--brand-2:#F5901E;--max:1320px;
  --sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --num:"DIN Alternate","Helvetica Neue",Arial,sans-serif;
}
/* 锚点跳转：吸顶头部会盖住区块顶部，必须给滚动容器留出头部那么高的内边距。
   值 = 实测头部高度 + 余量；改了头部高度这里要跟着改。 */
html{scroll-behavior:smooth;scroll-padding-top:90px}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

*{box-sizing:border-box}
figure,h1,h2,h3,h4,p,ul,ol,dl,dd,table{margin:0}
ul,ol{list-style:none;padding:0}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
body{margin:0;min-width:320px;overflow-x:clip;background:var(--paper);color:var(--ink);font-family:var(--sans)}
a{color:inherit}
.page-shell{width:min(100% - var(--shell-gutter)*2,var(--max));margin-inline:auto;padding:52px 0}

.site-header{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;
  gap:18px;height:64px;padding:0 var(--shell-gutter);background:rgba(255,255,255,.92);
  backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.brand-lockup{display:flex;align-items:center;gap:9px;flex:0 0 auto}
.brand-mark{width:31px;height:31px;flex:0 0 auto}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-name{font-size:16px;font-weight:700;white-space:nowrap;color:var(--ink)}
.brand-en{font-size:9px;letter-spacing:.24em;color:var(--dim);white-space:nowrap}
.brand-lockup .brand-en{opacity:1}
.site-nav{display:flex;gap:16px;overflow-x:auto;scrollbar-width:none}
.site-nav::-webkit-scrollbar{display:none}
.site-nav a{font-size:12.5px;color:var(--muted);text-decoration:none;white-space:nowrap;padding:5px 0;
  border-bottom:2px solid transparent}
.site-nav a:hover{color:var(--blue);border-bottom-color:var(--blue)}

/* 首屏：黑色块托住整段，把"没有 APP"这句话顶到最显眼 */
.hero{padding:44px 0 40px}
.eyebrow{font-size:10px;letter-spacing:.28em;color:var(--blue);margin-bottom:16px}
.hero h1{font-size:clamp(34px,7.6vw,62px);line-height:1.08;letter-spacing:-.035em;font-weight:800}
.hero-lead{margin-top:20px;font-size:15px;line-height:2;color:var(--muted);max-width:42em}
.market-band{display:grid;grid-template-columns:minmax(0,1fr);gap:1px;margin-top:26px;
  background:var(--line);border:1px solid var(--line);border-radius:12px;overflow:hidden}
.mk-item{padding:20px;background:var(--wash);min-width:0}
.mk-item b{display:block;font-family:var(--num);font-size:30px;font-weight:700;color:var(--blue)}
.mk-item span{display:block;margin-top:6px;font-size:11.5px;line-height:1.6;color:var(--muted)}

.sec-head{position:relative;padding-left:18px;margin-bottom:16px}
.sec-head::before{content:"";position:absolute;left:0;top:5px;bottom:5px;width:4px;border-radius:2px;background:var(--blue)}
.sec-cap{font-size:10px;letter-spacing:.26em;color:var(--blue);margin-bottom:10px}
.sec-head h2{font-size:clamp(22px,4.4vw,34px);line-height:1.26;letter-spacing:-.02em;font-weight:700}
.section-note{font-size:13.5px;line-height:2;color:var(--muted);max-width:56em;margin-bottom:30px}

/* 首屏：左结论右海报扇 */
.hero-grid{display:grid;gap:28px;align-items:center}
.hero-copy{min-width:0}
.hero-lead{margin-top:18px;font-size:14px;line-height:1.95;color:var(--dim)}
.hero-cta{display:inline-block;margin-top:22px;padding:12px 22px;border-radius:999px;
  font-size:13.5px;font-weight:600;color:#fff;background:var(--block);text-decoration:none}
.hero-cta:hover{background:var(--blue)}
.hero-fan-wrap{min-width:0;overflow:hidden}
.hero-fan{display:flex;justify-content:center;padding:22px 0 34px}
.hero-fan li{flex:0 0 auto;width:clamp(88px,22vw,146px);border-radius:10px;overflow:hidden;
  background:#fff;border:1px solid var(--line2);box-shadow:0 16px 34px rgba(15,17,21,.16)}
.hero-fan li+li{margin-left:clamp(-46px,-11vw,-28px)}
.hero-fan img{display:block;width:100%;height:auto;aspect-ratio:2/3;object-fit:cover}

/* 规则对照表 */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:12px}
.compare-table{width:100%;min-width:620px;border-collapse:collapse;font-size:13px}
.compare-table th,.compare-table td{padding:15px 16px;text-align:left;border-bottom:1px solid var(--line);
  line-height:1.8;vertical-align:top}
.compare-table thead th{background:var(--block);color:#fff;font-size:12px;letter-spacing:.06em;font-weight:700}
.compare-table tbody th{font-weight:700;color:var(--ink);white-space:nowrap}
.compare-table tbody td{color:var(--muted)}
.compare-table tbody tr:last-child th,.compare-table tbody tr:last-child td{border-bottom:0}
.compare-table tbody tr:nth-child(2n){background:var(--wash)}

.intro-lead{font-size:14.5px;line-height:2.05;color:var(--muted);max-width:56em;margin-bottom:26px}
.genre-compare{display:grid;grid-template-columns:minmax(0,1fr);border-top:1px solid var(--line)}
.genre-compare>div{display:grid;grid-template-columns:minmax(0,8em) minmax(0,1fr);gap:16px;
  padding:15px 0;border-bottom:1px solid var(--line);align-items:baseline}
.genre-compare dt{font-size:14px;font-weight:700;color:var(--blue)}
.genre-compare dd{font-size:13px;line-height:1.9;color:var(--muted)}
.ency-sub{margin:34px 0 16px}
.ency-sub h3{font-size:17px;font-weight:700}
.glossary-list{display:grid;grid-template-columns:minmax(0,1fr);border-top:1px solid var(--line)}
.glossary-list li{padding:15px 0;border-bottom:1px solid var(--line);min-width:0}
.glossary-list h4{font-size:14px;margin-bottom:5px}
.glossary-list p{font-size:12.5px;line-height:1.85;color:var(--muted)}

.faq-list,.lt-grid{display:grid;grid-template-columns:minmax(0,1fr);border-top:1px solid var(--line)}
.faq-item,.lt-item{padding:20px 0;border-bottom:1px solid var(--line);min-width:0}
.faq-item h3{font-size:15.5px;margin-bottom:9px}
.faq-item p{font-size:13px;line-height:2;color:var(--muted)}
.lt-item h3{font-size:13.5px;margin-bottom:5px}
.lt-item p{font-size:12px;line-height:1.85;color:var(--muted)}

.brand-about{display:grid;grid-template-columns:minmax(0,1fr);gap:28px;margin-bottom:34px}
.ba-tagline{color:var(--blue);font-size:19px;line-height:1.5;margin-bottom:15px}
.ba-body{color:var(--muted);font-size:14px;line-height:2.05;max-width:44em}
.ba-body+.ba-body{margin-top:13px}
.ba-queries{display:grid;grid-template-columns:minmax(0,1fr);border-top:1px solid var(--line)}
.ba-queries>div{padding:13px 2px;border-bottom:1px solid var(--line);min-width:0}
.ba-queries dt{font-size:14px;font-weight:700}
.ba-queries dd{margin-top:5px;font-size:12px;line-height:1.8;color:var(--muted)}
.about-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:26px}
.about-main p{font-size:13.5px;line-height:2.05;color:var(--muted)}
.about-main p+p{margin-top:13px}
.about-facts{display:grid;grid-template-columns:minmax(0,1fr);border-top:1px solid var(--line)}
.about-facts>div{display:grid;grid-template-columns:minmax(0,6em) minmax(0,1fr);gap:14px;
  padding:13px 0;border-bottom:1px solid var(--line);align-items:baseline}
.about-facts dt{font-size:12.5px;color:var(--blue);font-weight:600}
.about-facts dd{font-size:12.5px;line-height:1.75;color:var(--muted)}
.about-facts a{color:var(--blue);text-decoration:underline;text-underline-offset:3px}

.tg-float{position:fixed;right:16px;bottom:16px;z-index:60;display:inline-flex;align-items:center;gap:8px;
  padding:12px 17px;border-radius:999px;text-decoration:none;font-size:13.5px;font-weight:700;
  color:#fff;background:var(--blue);box-shadow:0 8px 26px rgba(26,86,219,.34);
  transition:transform .25s ease,box-shadow .25s ease}
.tg-float:hover{transform:translateY(-2px);box-shadow:0 12px 34px rgba(26,86,219,.46)}
.tg-float svg{width:17px;height:17px;flex:0 0 auto}

.site-footer{border-top:1px solid var(--line2);margin-top:32px;background:var(--block);color:#c9d0dc}
.footer-inner{display:grid;grid-template-columns:minmax(0,1fr);gap:28px;padding:46px 0 30px}
.footer-brand .brand-lockup{margin-bottom:12px}
.footer-brand .brand-name{color:#fff}
.footer-brand strong{font-size:15px;color:#fff}
.footer-brand p{font-size:12.5px;line-height:1.9;color:#a4adbd}
.footer-desc{margin-top:9px;color:#7e8798!important;font-size:12px!important}
.footer-heading{font-size:10px;letter-spacing:.2em;color:#7fa5f5;margin-bottom:12px}
.footer-nav li{margin-bottom:8px}
.footer-nav a{font-size:12.5px;color:#a4adbd;text-decoration:none}
.footer-nav a:hover{color:#fff}
.footer-meta p{font-size:12px;line-height:1.9;color:#a4adbd}
.footer-bottom{padding:15px 0 28px;border-top:1px solid rgba(255,255,255,.12)}
.footer-bottom p{font-size:11.5px;color:#7e8798}

@media (min-width:720px){
  :root{--shell-gutter:32px}
  .page-shell{padding:64px 0}
  .site-header{height:74px}
  .hero{padding:60px 0 52px}
  .market-band{grid-template-columns:repeat(3,minmax(0,1fr))}
  .pf-block{grid-template-columns:minmax(0,220px) minmax(0,1fr);gap:28px;padding:28px}
  .genre-compare,.glossary-list,.lt-grid{grid-template-columns:repeat(2,minmax(0,1fr));column-gap:36px}
  .ba-queries{grid-template-columns:repeat(2,minmax(0,1fr));column-gap:24px}
  .about-grid{grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:38px}
  .footer-inner{grid-template-columns:minmax(0,1.4fr) minmax(0,.8fr) minmax(0,1.1fr);gap:38px}
}
@media (min-width:1120px){
.hero-grid{grid-template-columns:minmax(0,1fr) 620px;gap:48px}

.shelf{grid-template-columns:minmax(0,1fr) 570px;gap:36px;padding:28px 30px}
.sh-grid{grid-template-columns:repeat(4,132px)}

  :root{--shell-gutter:56px}
  .page-shell{padding:76px 0}
  .hero{padding:76px 0 62px}
  .glossary-list{grid-template-columns:repeat(3,minmax(0,1fr))}
  .brand-about{grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:48px;align-items:start}
  .faq-item{display:grid;grid-template-columns:minmax(0,19em) minmax(0,1fr);gap:0 40px;align-items:baseline}
  .faq-item h3{margin-bottom:0}
}
@media (max-width:719px){.tg-float span{display:none}.tg-float{padding:13px;right:14px;bottom:14px}}
@media (prefers-reduced-motion:reduce){.shelf,.tg-float{transition:none}}

/* ── 按平台分组的片单货架：一个平台一层 ────────────────────────── */
/* 用 flex 换行而不是固定列数：各平台收录数不同（6/4/2），
   固定列数必然有一层末行缺角，换行布局天然没有这个问题。 */
.shelves{display:grid;gap:26px}
.shelf{display:grid;gap:22px;padding:24px;border-radius:14px;
  background:var(--wash);border:1px solid var(--line);transition:background .3s ease}
.shelf:hover{background:var(--blue-soft);border-color:var(--blue-line)}
.sh-main{min-width:0}
.sh-head{display:flex;align-items:baseline;flex-wrap:wrap;gap:10px}
.sh-no{font-family:var(--num);font-size:12px;font-weight:700;color:var(--blue);letter-spacing:.1em}
.sh-head h3{font-size:22px;line-height:1.25;letter-spacing:-.01em}
.sh-mode{padding:4px 11px;border-radius:999px;font-size:11.5px;font-weight:600;color:#fff;background:var(--block)}
.sh-scale{margin-top:12px;font-family:var(--num);font-size:13px;line-height:1.7;color:var(--blue)}
.sh-facts{margin-top:12px}
.sh-facts p{font-size:13px;line-height:1.9;color:var(--muted)}
.sh-facts p+p{margin-top:9px}
.sh-facts span{display:inline-block;margin-right:9px;padding:2px 8px;border-radius:3px;
  font-size:10.5px;font-weight:700;color:var(--ink);background:#fff;border:1px solid var(--line2)}
/* 右栏配图：海报 / 条形图 / 要点，三选一，都不留白 */
.sh-visual{min-width:0}
.sh-vcap{font-size:10px;letter-spacing:.22em;color:var(--blue);margin-bottom:12px}
.sh-note{margin-top:11px;font-size:11px;line-height:1.6;color:var(--dim)}
/* 固定列宽而不是 flex 撑满——三张海报被拉成四百多宽就不像海报了 */
.sh-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(112px,132px));gap:14px}
.sh-cover{margin:0;border-radius:8px;overflow:hidden;background:#fff;border:1px solid var(--line2)}
.sh-cover img{display:block;width:100%;height:auto;aspect-ratio:2/3;object-fit:cover}
.sh-card h4{margin-top:9px;font-size:13px;line-height:1.4;letter-spacing:-.01em}
.sh-bars{display:grid;gap:14px}
.sh-bar b{display:block;font-family:var(--num);font-size:19px;font-weight:700;color:var(--ink)}
.sh-bar u{display:block;height:7px;margin:7px 0;border-radius:4px;background:var(--line);text-decoration:none}
.sh-bar i{display:block;height:100%;border-radius:4px;background:var(--blue);min-width:4px}
.sh-bar span{font-size:11.5px;line-height:1.6;color:var(--muted)}
.sh-notes{display:grid;gap:10px}
.sh-notes li{position:relative;padding-left:16px;font-size:13px;line-height:1.85;color:var(--muted)}
.sh-notes li::before{content:"";position:absolute;left:0;top:11px;width:6px;height:6px;
  border-radius:50%;background:var(--blue)}


@media (min-width:1120px){
  .shelf{padding:26px 28px}
  .sh-card{flex:1 1 150px;max-width:none}
}