/* 澄思商业 · 文章页样式（与官网首页同一套设计令牌，全站自包含、无外部 CDN） */
:root{
  --paper:#f5f5f7;
  --paper-2:#e8e8ed;
  --ink:#1d1d1f;
  --ink-soft:#424245;
  --muted:#6e6e73;
  --line:#d2d2d7;
  --accent:#0071e3;
  --accent-deep:#0077ed;
  --white:#fff;
  --radius:18px;
  --sans:-apple-system,BlinkMacSystemFont,"SF Pro Text","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --serif:"Songti SC","STSong","Source Han Serif SC","Noto Serif SC","SimSun",serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:var(--sans);background:var(--paper);color:var(--ink);
  line-height:1.8;-webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
.wrap{max-width:1120px;margin:0 auto;padding:0 28px}
.narrow{max-width:788px;margin:0 auto;padding:0 28px}

/* nav */
nav{position:sticky;top:0;z-index:50;background:rgba(245,245,247,.9);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:66px;gap:20px}
.brand{display:flex;align-items:baseline;gap:10px;flex:none}
.brand .cn{font-size:20px;font-weight:700;letter-spacing:.02em}
.brand .cn b{color:var(--accent);font-weight:700}
.brand .en{font-size:11px;letter-spacing:.22em;color:var(--muted);text-transform:uppercase}
.nav-links{display:flex;align-items:center;gap:26px;font-size:14px;color:var(--ink-soft)}
.nav-links a:hover{color:var(--accent)}
.nav-cta{display:inline-flex;align-items:center;background:var(--ink);color:var(--white);padding:9px 18px;border-radius:999px;font-size:14px;font-weight:600}
.nav-cta:hover{background:var(--accent-deep);color:#fff}

/* breadcrumb */
.crumb{font-size:13px;color:var(--muted);padding:22px 0 0}
.crumb a:hover{color:var(--accent)}
.crumb span{margin:0 8px;opacity:.5}

/* header */
.art-head{padding:26px 0 34px;border-bottom:1px solid var(--line)}
.kicker{display:inline-flex;align-items:center;gap:10px;font-size:13px;font-weight:600;letter-spacing:.06em;color:var(--accent-deep)}
.kicker::before{content:"";width:26px;height:1px;background:var(--accent)}
h1{font-size:clamp(27px,3.6vw,40px);line-height:1.3;letter-spacing:-.01em;margin:16px 0 0;font-weight:700;text-wrap:balance}
.meta{display:flex;flex-wrap:wrap;gap:18px;font-size:13px;color:var(--muted);margin-top:18px}
.meta b{color:var(--ink-soft);font-weight:600}

/* summary */
.summary{margin:34px 0 0;padding:24px 26px;background:var(--white);border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:14px;font-size:15.5px;color:var(--ink-soft)}
.summary p{margin:0}
.summary p+p{margin-top:10px}
.summary strong{color:var(--ink)}

/* article body */
.art-body{padding:38px 0 10px;font-size:16.5px;color:var(--ink-soft)}
.art-body h2{font-size:clamp(21px,2.4vw,26px);color:var(--ink);margin:46px 0 16px;padding-top:6px;line-height:1.4;letter-spacing:-.01em}
.art-body h2:first-child{margin-top:6px}
.art-body h3{font-size:18px;color:var(--ink);margin:30px 0 10px;line-height:1.5}
.art-body p{margin:0 0 16px}
.art-body strong{color:var(--ink);font-weight:600}
.art-body ul,.art-body ol{margin:0 0 18px;padding-left:22px}
.art-body li{margin:0 0 8px}
.art-body li::marker{color:var(--accent)}
.art-body a{color:var(--accent-deep);border-bottom:1px solid rgba(0,113,227,.3)}
.art-body a:hover{border-bottom-color:var(--accent-deep)}
.art-body blockquote{margin:24px 0;padding:16px 22px;background:var(--paper-2);border-radius:12px;font-size:15.5px;color:var(--ink-soft)}
.art-body blockquote p:last-child{margin-bottom:0}
.art-body code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:14px;background:var(--paper-2);padding:2px 6px;border-radius:5px}
.art-body table{width:100%;border-collapse:collapse;margin:22px 0;font-size:15px;background:var(--white);border-radius:12px;overflow:hidden}
.art-body th,.art-body td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.art-body th{background:var(--paper-2);font-weight:600;color:var(--ink);font-size:14px}
.art-body tr:last-child td{border-bottom:none}
.art-body hr{border:none;border-top:1px solid var(--line);margin:36px 0}

/* faq */
.faq{margin:48px 0 0}
.faq h2{font-size:clamp(21px,2.4vw,26px);margin-bottom:8px}
.faq .hint{font-size:14px;color:var(--muted);margin-bottom:18px}
.faq details{background:var(--white);border:1px solid var(--line);border-radius:14px;margin-bottom:12px;overflow:hidden}
.faq summary{cursor:pointer;padding:17px 22px;font-weight:600;font-size:16px;color:var(--ink);list-style:none;position:relative;padding-right:48px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:22px;top:50%;transform:translateY(-50%);font-size:20px;font-weight:400;color:var(--accent)}
.faq details[open] summary::after{content:"–"}
.faq .ans{padding:0 22px 18px;font-size:15.5px;color:var(--ink-soft)}
.faq .ans p{margin:0 0 10px}
.faq .ans p:last-child{margin-bottom:0}

/* related */
.related{margin:46px 0 0;padding:26px 0 0;border-top:1px solid var(--line)}
.related h2{font-size:18px;margin-bottom:14px}
.related ul{list-style:none}
.related li{padding:12px 0;border-bottom:1px dashed var(--line);display:flex;justify-content:space-between;gap:16px;align-items:baseline}
.related li:last-child{border-bottom:none}
.related a{font-size:15.5px;color:var(--ink);font-weight:500}
.related a:hover{color:var(--accent)}
.related span{font-size:12.5px;color:var(--muted);flex:none}

/* cta */
.cta{margin:46px 0 0;background:var(--ink);color:#fff;border-radius:var(--radius);padding:34px 32px}
.cta .t{font-size:20px;font-weight:700;line-height:1.5}
.cta .d{font-size:14.5px;color:rgba(255,255,255,.75);margin-top:10px;line-height:1.75}
.cta .row{display:flex;flex-wrap:wrap;gap:14px;margin-top:22px;align-items:center}
.cta .b1{background:#fff;color:var(--ink);padding:11px 22px;border-radius:999px;font-size:14px;font-weight:600}
.cta .b2{border:1px solid rgba(255,255,255,.32);color:#fff;padding:11px 22px;border-radius:999px;font-size:14px;font-weight:600}
.cta .b1:hover{background:var(--accent);color:#fff}
.cta .b2:hover{border-color:#fff}

/* entity footer */
.ent{margin:56px 0 0;padding:30px 0 8px;border-top:1px solid var(--line);font-size:13.5px;color:var(--muted);line-height:1.9}
.ent strong{color:var(--ink-soft)}
.ent a{color:var(--ink-soft)}
footer{border-top:1px solid var(--line);margin-top:26px;padding:24px 0 40px;font-size:12.5px;color:var(--muted)}
footer .frow{display:flex;flex-wrap:wrap;gap:16px;justify-content:space-between;align-items:center}
footer a:hover{color:var(--accent)}
footer img{height:14px;vertical-align:-2px;margin-right:4px}

/* list page */
.hero-list{padding:56px 0 26px}
.hero-list h1{font-size:clamp(28px,4vw,44px);margin:14px 0 0}
.hero-list p{font-size:16.5px;color:var(--ink-soft);margin-top:16px;max-width:720px}
.catbar{display:flex;flex-wrap:wrap;gap:10px;margin:24px 0 0;font-size:13px;color:var(--ink-soft)}
.catbar span{background:var(--white);border:1px solid var(--line);padding:6px 12px;border-radius:999px}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:20px;margin:38px 0 0}
.card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px;display:flex;flex-direction:column;transition:transform .16s ease,box-shadow .16s ease}
.card:hover{transform:translateY(-3px);box-shadow:0 14px 34px rgba(0,0,0,.07)}
.card .k{font-size:12.5px;color:var(--muted);letter-spacing:.04em}
.card h3{font-size:19px;line-height:1.45;margin:10px 0 10px;color:var(--ink)}
.card p{font-size:14.5px;color:var(--ink-soft);line-height:1.7;flex:1}
.card .more{font-size:13.5px;color:var(--accent-deep);font-weight:600;margin-top:16px}

@media (max-width:640px){
  .nav-links a:not(.nav-cta){display:none}
  .art-body{font-size:16px}
  .summary{padding:20px}
  .cta{padding:26px 22px}
  .cta .t{font-size:18px}
}

/* 导航防折行：中屏隐藏次要项，避免菜单文字竖排 */
.nav-links a{white-space:nowrap}
@media (min-width:641px) and (max-width:1060px){
  .nav-links{gap:14px;font-size:13.5px}
  .brand .en{display:none}
  .nav-links a.nav-sec{display:none}
}

/* ============ 作品展示：列表 ============ */
.chips{display:flex;flex-wrap:wrap;gap:9px;margin:26px 0 0}
.chip{font:inherit;font-size:13px;color:var(--ink-soft);background:var(--white);border:1px solid var(--line);padding:6px 14px;border-radius:999px;cursor:pointer;transition:.15s}
.chip:hover{border-color:var(--ink-soft)}
.chip.on{background:var(--ink);color:#fff;border-color:var(--ink)}
.v-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin:32px 0 0}
@media (min-width:900px){.v-grid{grid-template-columns:repeat(3,1fr);gap:20px}}
.v-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;transition:transform .16s ease,box-shadow .16s ease}
.v-card:hover{transform:translateY(-3px);box-shadow:0 14px 34px rgba(0,0,0,.08)}
.v-poster{position:relative;aspect-ratio:9/16;background-color:#cfd8e3;background-size:cover;background-position:center}
.v-kind{position:absolute;top:10px;left:10px;background:rgba(255,255,255,.94);color:var(--ink);font-size:11px;font-weight:600;padding:3px 9px;border-radius:999px}
.v-dur{position:absolute;top:10px;right:10px;background:rgba(0,0,0,.55);color:#fff;font-size:11px;padding:2px 8px;border-radius:999px}
.v-play{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:48px;height:48px;border-radius:50%;background:rgba(255,255,255,.92);box-shadow:0 4px 16px rgba(0,0,0,.2)}
.v-play::after{content:"";position:absolute;top:50%;left:50%;transform:translate(-42%,-50%);border-left:14px solid var(--ink);border-top:9px solid transparent;border-bottom:9px solid transparent}
.v-ind{position:absolute;left:0;right:0;bottom:0;padding:22px 12px 10px;font-size:12px;color:#fff;background:linear-gradient(transparent,rgba(0,0,0,.6))}
.v-body{padding:14px 14px 16px;flex:1}
.v-body h3{font-size:14.5px;line-height:1.5;margin:0 0 6px;color:var(--ink);font-weight:600}
.v-body p{font-size:12.5px;color:var(--muted);margin:0;line-height:1.55}

/* ============ 作品展示：单片页 ============ */
.player-wrap{display:flex;justify-content:center;margin:32px 0 0}
.player{width:auto;height:auto;max-width:min(360px,100%);max-height:74vh;aspect-ratio:9/16;background:#000;border-radius:var(--radius);box-shadow:0 18px 44px rgba(0,0,0,.16);display:block;margin:0 auto}
@media (min-width:641px){.player{max-width:400px;max-height:78vh}}
.player-wide{aspect-ratio:16/9;max-width:min(760px,100%)}
.player-hint{font-size:12.5px;color:var(--muted);text-align:center;margin:14px 0 0}
.points{margin:40px 0 0;padding:24px 26px;background:var(--white);border:1px solid var(--line);border-radius:14px}
.points h2{font-size:17px;margin:0 0 12px}
.points ul{margin:0;padding-left:20px;font-size:15px;color:var(--ink-soft)}
.points li{margin:0 0 8px}
.points li:last-child{margin-bottom:0}
.points li::marker{color:var(--accent)}
.rel-grid{display:grid;grid-template-columns:1fr;gap:12px}
@media (min-width:641px){.rel-grid{grid-template-columns:repeat(3,1fr)}}
.rel-card{display:block;background:var(--white);border:1px solid var(--line);border-radius:12px;padding:14px 16px;font-size:14px;color:var(--ink);line-height:1.5}
.rel-card:hover{border-color:var(--accent)}
.rel-card span{display:block;font-size:11.5px;color:var(--muted);margin-bottom:5px;letter-spacing:.03em}