.page-yibin{
  --yb-ink:#241a28;
  --yb-indigo:#25334e;
  --yb-red:#8e3344;
  --yb-red-dark:#652635;
  --yb-gold:#b68a4f;
  --yb-paper:#f3ecde;
  --yb-paper-2:#e6dac5;
  --yb-page:#fffaf0;
  --yb-muted:#756a5d;
  --yb-line:rgba(65,47,50,.18);
  background:var(--yb-paper);
  color:var(--yb-ink);
  overflow-x:clip;
}
.page-yibin *,.page-yibin *::before,.page-yibin *::after{box-sizing:border-box}
.page-yibin .city-main{overflow:clip;background:var(--yb-paper)}
.page-yibin .city-shell{width:min(1180px,calc(100% - 48px));margin-inline:auto}
.page-yibin .city-eyebrow{margin:0;color:var(--yb-red);font-size:11px;font-weight:900;letter-spacing:.2em;text-transform:uppercase}
.page-yibin .city-eyebrow::before{width:30px;background:currentColor}
.page-yibin h1,.page-yibin h2,.page-yibin h3,.page-yibin p,.page-yibin figure{margin-top:0}
.page-yibin a:focus-visible,.page-yibin button:focus-visible,.page-yibin summary:focus-visible{outline:3px solid var(--yb-gold);outline-offset:4px}

.page-yibin .yb-hero{position:relative;min-height:850px;padding:26px 0 84px;color:#fff8eb;background:
  linear-gradient(90deg,rgba(182,138,79,.09) 1px,transparent 1px) 0 0/96px 100%,
  linear-gradient(126deg,#211625 0%,#2c2031 48%,#202a42 100%)}
.page-yibin .yb-hero::before{content:"";position:absolute;left:50%;top:0;bottom:0;width:18px;transform:translateX(-50%);background:linear-gradient(90deg,rgba(0,0,0,.24),rgba(255,255,255,.08),rgba(0,0,0,.3));box-shadow:0 0 30px rgba(0,0,0,.35);opacity:.45}
.page-yibin .yb-hero::after{content:"";position:absolute;left:0;right:0;bottom:0;height:5px;background:linear-gradient(90deg,var(--yb-red) 0 42%,var(--yb-gold) 42% 58%,var(--yb-indigo) 58%)}
.page-yibin .yb-hero .city-shell{position:relative;z-index:1}
.page-yibin .city-crumb{display:flex;align-items:center;gap:10px;padding:18px 0;color:rgba(255,248,235,.6);font-size:13px}
.page-yibin .city-crumb a,.page-yibin .city-crumb strong{color:inherit;text-decoration:none;font-weight:650}
.page-yibin .city-crumb i{font-style:normal;opacity:.4}
.page-yibin .yb-hero-grid{display:grid;grid-template-columns:minmax(0,.95fr) minmax(470px,1.05fr);grid-template-rows:1fr auto;align-items:center;gap:30px 48px;padding-top:46px}
.page-yibin .yb-hero-copy{padding:22px 0}
.page-yibin .yb-hero-copy .city-eyebrow{color:#d7ad71}
.page-yibin .yb-hero-copy h1{max-width:650px;margin:21px 0 24px;font-size:58px;line-height:1.06;letter-spacing:-.05em;color:#fff8eb}
.page-yibin .yb-hero-copy h1 em{display:block;margin-top:8px;color:#f0c9bc;font-style:normal;font-weight:520}
.page-yibin .yb-hero-copy>p:not(.city-eyebrow){max-width:625px;margin-bottom:30px;color:rgba(255,248,235,.72);font-size:17px;line-height:1.88}
.page-yibin .yb-hero-actions{display:flex;flex-wrap:wrap;gap:12px}
.page-yibin .yb-hero-actions a{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 20px;border:1px solid rgba(215,173,113,.58);color:#fff8eb;text-decoration:none;font-size:14px;font-weight:850;transition:.25s ease}
.page-yibin .yb-hero-actions a:first-child{background:#b44a5a;border-color:#b44a5a}.page-yibin .yb-hero-actions a:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(0,0,0,.25)}
.page-yibin .yb-hero-visual{position:relative;grid-column:2;grid-row:1 / span 2;align-self:stretch;min-height:650px;margin:0;overflow:hidden;border:1px solid rgba(215,173,113,.32);background:#201923;box-shadow:0 28px 70px rgba(0,0,0,.32)}
.page-yibin .yb-hero-visual::before{content:"";position:absolute;z-index:1;left:50%;top:0;bottom:0;width:7px;transform:translateX(-50%);background:linear-gradient(90deg,rgba(0,0,0,.35),rgba(255,244,219,.16),rgba(0,0,0,.4));pointer-events:none}
.page-yibin .yb-hero-visual picture,.page-yibin .yb-hero-visual img{display:block;width:100%;height:100%}
.page-yibin .yb-hero-visual img{min-height:650px;object-fit:cover;filter:saturate(.88) contrast(1.03)}
.page-yibin .yb-hero-visual figcaption{position:absolute;z-index:2;left:22px;right:22px;bottom:20px;display:grid;grid-template-columns:1fr 56px 1fr;align-items:center;gap:14px;padding:14px 16px;background:rgba(29,20,30,.86);border:1px solid rgba(215,173,113,.28);backdrop-filter:blur(10px)}
.page-yibin .yb-hero-visual figcaption span{font-size:9px;letter-spacing:.17em;color:#e4bd85}.page-yibin .yb-hero-visual figcaption span:last-child{text-align:right}.page-yibin .yb-hero-visual figcaption i{height:3px;background:linear-gradient(90deg,var(--yb-red),var(--yb-gold),#53698c)}
.page-yibin .yb-hero-dashboard{position:relative;z-index:3;align-self:end;margin-right:-112px;padding:20px;background:rgba(35,24,37,.93);border:1px solid rgba(215,173,113,.4);box-shadow:0 18px 52px rgba(0,0,0,.35);backdrop-filter:blur(12px)}
.page-yibin .yb-dashboard-tabs{display:grid;grid-template-columns:1fr 1fr;gap:7px;margin-bottom:12px}
.page-yibin .yb-dashboard-tabs button{display:flex;align-items:center;gap:10px;min-height:45px;padding:10px 12px;border:1px solid rgba(255,248,235,.13);background:transparent;color:rgba(255,248,235,.6);font:800 13px/1.2 inherit;text-align:left;cursor:pointer}
.page-yibin .yb-dashboard-tabs small{color:#d3a260;font:900 9px/1 system-ui}.page-yibin .yb-dashboard-tabs button.is-active{background:rgba(180,74,90,.2);border-color:#bd6270;color:#fff8eb}
.page-yibin .yb-dashboard-page{position:relative;min-height:145px;padding:17px 18px 33px;background:linear-gradient(90deg,rgba(255,250,240,.055) calc(50% - 1px),rgba(215,173,113,.22) 50%,rgba(255,250,240,.055) calc(50% + 1px));border-left:3px solid var(--yb-red)}
.page-yibin .yb-dashboard-page small{color:#d8ad72;font-size:9px;letter-spacing:.16em}.page-yibin .yb-dashboard-page b{display:block;margin:12px 0 6px;font-size:18px}.page-yibin .yb-dashboard-page p{margin:0;color:rgba(255,248,235,.66);font-size:12px;line-height:1.7}.page-yibin .yb-dashboard-page span{position:absolute;left:18px;bottom:10px;color:rgba(255,248,235,.4);font-size:9px;letter-spacing:.05em}

.page-yibin .city-ad{padding:34px 0;background:#dfd3c0}.page-yibin .city-ad.is-dark{background:#201722}.page-yibin .city-ad-inner{width:min(1200px,calc(100% - 48px));margin:auto;overflow:hidden;border-radius:3px;box-shadow:0 24px 66px rgba(48,32,38,.14)}.page-yibin .city-ad picture,.page-yibin .city-ad img{display:block;width:100%}.page-yibin .city-ad img{aspect-ratio:3/1;object-fit:contain;background:#fff}

.page-yibin .yb-spread{position:relative;padding:120px 0 132px;background:
  linear-gradient(90deg,transparent calc(50% - 10px),rgba(73,49,54,.1) calc(50% - 10px),rgba(255,255,255,.5) 50%,rgba(73,49,54,.1) calc(50% + 10px),transparent calc(50% + 10px)),
  var(--yb-paper)}
.page-yibin .yb-spread-head{display:grid;grid-template-columns:260px 1fr;gap:62px;align-items:start;margin-bottom:108px}.page-yibin .yb-spread-head>div{display:grid;grid-template-columns:1.15fr .85fr;gap:44px;align-items:end}.page-yibin .yb-spread-head h2,.page-yibin .yb-chapter h2,.page-yibin .yb-section-head h2,.page-yibin .yb-faq h2{margin:0;font-size:45px;line-height:1.11;letter-spacing:-.043em}.page-yibin .yb-spread-head>div>p{margin:0;color:var(--yb-muted);font-size:15px;line-height:1.9}
.page-yibin .yb-chapter{position:relative;display:grid;grid-template-columns:minmax(0,1fr) 54px minmax(0,1fr);gap:0 30px;margin-bottom:142px;scroll-margin-top:110px}.page-yibin .yb-chapter:last-child{margin-bottom:0}
.page-yibin .yb-chapter-label{position:absolute;z-index:4;left:50%;top:-72px;width:110px;transform:translateX(-50%);display:grid;grid-template-columns:1fr auto;align-items:end;gap:4px;padding:10px 8px;border-bottom:2px solid var(--yb-red);background:var(--yb-paper);text-align:center}.page-yibin .yb-chapter-label small{grid-column:1 / -1;color:#9a7654;font-size:8px;letter-spacing:.16em}.page-yibin .yb-chapter-label b{font:900 25px/1 system-ui}.page-yibin .yb-chapter-label span{font-size:11px;color:var(--yb-muted)}
.page-yibin .yb-book-spine{position:relative;grid-column:2;min-height:540px}.page-yibin .yb-book-spine::before,.page-yibin .yb-book-spine::after{content:"";position:absolute;top:0;bottom:0;width:1px;background:rgba(86,53,59,.2)}.page-yibin .yb-book-spine::before{left:7px}.page-yibin .yb-book-spine::after{right:7px}.page-yibin .yb-book-spine i{position:absolute;left:50%;top:0;bottom:0;width:12px;transform:translateX(-50%);background:linear-gradient(90deg,#6d2a38,#a54a58 50%,#632431);box-shadow:inset 2px 0 rgba(255,255,255,.16),inset -2px 0 rgba(0,0,0,.18)}
.page-yibin .yb-page-panel{position:relative;min-height:540px;padding:48px 44px;background:var(--yb-page);border:1px solid var(--yb-line);box-shadow:0 20px 54px rgba(52,35,40,.09)}.page-yibin .yb-page-left{grid-column:1}.page-yibin .yb-page-right{grid-column:3}.page-yibin .yb-page-panel::after{content:"";position:absolute;top:20px;bottom:20px;width:1px;background:rgba(142,51,68,.14)}.page-yibin .yb-page-left::after{right:16px}.page-yibin .yb-page-right::after{left:16px}
.page-yibin .yb-page-panel h2{margin:14px 0 19px}.page-yibin .yb-page-panel>p:not(.city-eyebrow){margin:0;color:var(--yb-muted);font-size:15px;line-height:1.9}
.page-yibin .yb-page-list{display:grid;grid-template-columns:1fr 1fr;margin-top:34px;border-top:1px solid var(--yb-line);border-left:1px solid var(--yb-line)}.page-yibin .yb-page-list span{display:flex;align-items:center;gap:10px;min-height:72px;padding:14px;border-right:1px solid var(--yb-line);border-bottom:1px solid var(--yb-line);font-size:13px;font-weight:800}.page-yibin .yb-page-list i{color:var(--yb-red);font:900 10px/1 system-ui;font-style:normal}
.page-yibin .yb-chapter-image{position:relative;min-height:540px;margin:0;overflow:hidden;background:#2d2630;border:1px solid var(--yb-line);box-shadow:0 20px 54px rgba(52,35,40,.1)}.page-yibin .yb-opening .yb-chapter-image{grid-column:3}.page-yibin .yb-chapter-image img{display:block;width:100%;height:100%;min-height:540px;object-fit:cover}.page-yibin .yb-chapter-image figcaption,.page-yibin .yb-platform-image figcaption,.page-yibin .yb-growth-image figcaption{position:absolute;left:0;right:0;bottom:0;padding:42px 22px 18px;color:#fff9ee;font-size:12px;line-height:1.6;background:linear-gradient(180deg,transparent,rgba(31,22,33,.9))}

.page-yibin .yb-context{display:block}.page-yibin .yb-context-intro{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:end}.page-yibin .yb-context-intro .city-eyebrow{grid-column:1 / -1}.page-yibin .yb-context-intro h2{margin-top:14px}.page-yibin .yb-context-intro>p:not(.city-eyebrow){margin:0;color:var(--yb-muted);font-size:15px;line-height:1.9}
.page-yibin .yb-context-tabs{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:42px 0 12px}.page-yibin .yb-context-tabs button{min-height:52px;border:1px solid var(--yb-line);background:rgba(255,250,240,.5);color:var(--yb-muted);font:850 13px/1.3 inherit;cursor:pointer}.page-yibin .yb-context-tabs button.is-active{background:var(--yb-red);border-color:var(--yb-red);color:#fff8eb}
.page-yibin .yb-context-spread{display:grid;grid-template-columns:1fr 54px 1fr;min-height:360px;background:var(--yb-page);border:1px solid var(--yb-line);box-shadow:0 20px 54px rgba(52,35,40,.08)}.page-yibin .yb-context-spread section{padding:50px 45px}.page-yibin .yb-context-spread small{color:#9c6d45;font-size:9px;letter-spacing:.17em}.page-yibin .yb-context-spread h3{margin:72px 0 12px;font-size:25px;line-height:1.3}.page-yibin .yb-context-spread p{margin:0;color:var(--yb-muted);font-size:14px;line-height:1.86}.page-yibin .yb-context-spine{position:relative;background:linear-gradient(90deg,#e0d1ba,#f8f0e3 48%,#cdbca5)}.page-yibin .yb-context-spine i{position:absolute;left:50%;width:24px;height:6px;transform:translateX(-50%);background:var(--yb-red);border-radius:50%}.page-yibin .yb-context-spine i:nth-child(1){top:22%}.page-yibin .yb-context-spine i:nth-child(2){top:49%}.page-yibin .yb-context-spine i:nth-child(3){top:76%}
.page-yibin .yb-boundary{margin:16px 0 0;padding:16px 18px;border-left:3px solid var(--yb-gold);background:rgba(255,250,240,.67);color:var(--yb-muted);font-size:13px;line-height:1.78}

.page-yibin .yb-ledger .yb-chapter-image{grid-column:1}.page-yibin .yb-ledger .yb-book-spine{grid-column:2}.page-yibin .yb-ledger-switch{display:grid;grid-template-columns:repeat(3,1fr);gap:6px;margin-top:30px}.page-yibin .yb-ledger-switch button{min-height:46px;border:1px solid var(--yb-line);background:#f4ebdd;color:var(--yb-muted);font:800 12px/1.2 inherit;cursor:pointer}.page-yibin .yb-ledger-switch button.is-active{background:var(--yb-indigo);border-color:var(--yb-indigo);color:white}.page-yibin .yb-ledger-result{min-height:190px;padding:29px 28px;background:var(--yb-indigo);color:white;border-top:5px solid #4d6184}.page-yibin .yb-ledger-result small{color:#d5b47b;font-size:9px;letter-spacing:.16em}.page-yibin .yb-ledger-result b{display:block;margin:16px 0 8px;font-size:21px}.page-yibin .yb-ledger-result p{margin:0;color:rgba(255,255,255,.68);font-size:13px;line-height:1.78}

.page-yibin .yb-change{display:block}.page-yibin .yb-change-title{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:end}.page-yibin .yb-change-title .city-eyebrow{grid-column:1 / -1}.page-yibin .yb-change-title h2{margin-top:14px}.page-yibin .yb-change-title>p:not(.city-eyebrow){margin:0;color:var(--yb-muted);font-size:15px;line-height:1.9}.page-yibin .yb-revision-grid{display:grid;grid-template-columns:1fr 1fr;gap:54px;margin-top:44px;background:linear-gradient(90deg,transparent calc(50% - 8px),rgba(75,51,56,.15) calc(50% - 8px),#fffaf0 50%,rgba(75,51,56,.15) calc(50% + 8px),transparent calc(50% + 8px))}.page-yibin .yb-revision-grid a{position:relative;min-height:330px;padding:36px 38px;border:1px solid var(--yb-line);background:var(--yb-page);color:inherit;text-decoration:none;box-shadow:0 20px 54px rgba(52,35,40,.08);transition:.24s ease}.page-yibin .yb-revision-grid a::before{content:"";position:absolute;left:0;right:0;bottom:0;height:6px;background:var(--yb-red)}.page-yibin .yb-revision-grid a:last-child::before{background:var(--yb-indigo)}.page-yibin .yb-revision-grid a:hover{transform:translateY(-4px)}.page-yibin .yb-revision-grid small{color:#9c6e47;font-size:9px;letter-spacing:.16em}.page-yibin .yb-revision-grid h3{margin:85px 0 12px;font-size:27px}.page-yibin .yb-revision-grid p{margin:0 0 27px;color:var(--yb-muted);font-size:13px;line-height:1.78}.page-yibin .yb-revision-grid span{color:var(--yb-red-dark);font-size:12px;font-weight:900}.page-yibin .yb-verify{display:grid;grid-template-columns:170px 1fr;gap:28px;margin-top:22px;padding:18px 20px;border-top:1px solid var(--yb-line);border-bottom:1px solid var(--yb-line)}.page-yibin .yb-verify b{font-size:14px}.page-yibin .yb-verify p{margin:0;color:var(--yb-muted);font-size:13px;line-height:1.75}

.page-yibin .yb-platform{padding:120px 0;background:#211723;color:#fff8ec}.page-yibin .yb-section-head{display:grid;grid-template-columns:minmax(0,1.16fr) minmax(320px,.84fr);gap:62px;align-items:end;margin-bottom:48px}.page-yibin .yb-section-head .city-eyebrow{color:#d5a967}.page-yibin .yb-section-head h2{margin-top:14px}.page-yibin .yb-section-head>p{margin:0;color:rgba(255,248,236,.64);font-size:15px;line-height:1.9}
.page-yibin .yb-platform-spread{display:grid;grid-template-columns:340px minmax(0,1fr);min-height:580px;border:1px solid rgba(213,169,103,.28);background:linear-gradient(90deg,rgba(255,255,255,.02),rgba(37,51,78,.18))}.page-yibin .yb-workspace-books{display:grid;padding:22px;border-right:10px solid #3a293b;box-shadow:inset -2px 0 rgba(255,255,255,.08)}.page-yibin .yb-workspace-books article{display:grid;grid-template-columns:44px 1fr;align-items:center;gap:16px;padding:20px 13px;border-bottom:1px solid rgba(213,169,103,.17);border-left:7px solid var(--yb-red)}.page-yibin .yb-workspace-books article:nth-child(even){border-left-color:#53698c}.page-yibin .yb-workspace-books article:last-child{border-bottom:0}.page-yibin .yb-workspace-books span{color:#d3a361;font:900 11px/1 system-ui}.page-yibin .yb-workspace-books h3{margin:0 0 5px;font-size:19px}.page-yibin .yb-workspace-books p{margin:0;color:rgba(255,248,236,.58);font-size:12px;line-height:1.65}.page-yibin .yb-platform-image{position:relative;margin:0;overflow:hidden;background:#eee8df}.page-yibin .yb-platform-image img{display:block;width:100%;height:100%;object-fit:contain;background:#efede8}.page-yibin .yb-platform-note{margin:20px 0 0;padding:15px 18px;border-left:3px solid var(--yb-gold);background:rgba(255,255,255,.045);color:rgba(255,248,236,.64);font-size:12px;line-height:1.76}

.page-yibin .yb-growth{padding:120px 0;background:#ded2bf}.page-yibin .yb-growth .yb-section-head .city-eyebrow{color:var(--yb-red)}.page-yibin .yb-growth .yb-section-head>p{color:var(--yb-muted)}.page-yibin .yb-growth-spread{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(350px,.92fr);gap:0;min-height:620px;box-shadow:0 24px 64px rgba(53,34,39,.1)}.page-yibin .yb-growth-image{position:relative;margin:0;overflow:hidden;background:#29222c}.page-yibin .yb-growth-image img{display:block;width:100%;height:100%;min-height:620px;object-fit:cover}.page-yibin .yb-growth-page{position:relative;padding:55px 48px;background:var(--yb-page);border-left:13px solid var(--yb-red-dark);box-shadow:inset 3px 0 rgba(255,255,255,.34)}.page-yibin .yb-growth-page>small{color:#9c6d46;font-size:9px;letter-spacing:.17em}.page-yibin .yb-growth-page h3{margin:72px 0 28px;font-size:31px;line-height:1.28;letter-spacing:-.025em}.page-yibin .yb-growth-page ol{margin:0;padding:0;list-style:none;border-top:1px solid var(--yb-line)}.page-yibin .yb-growth-page li{display:flex;align-items:center;gap:16px;min-height:58px;border-bottom:1px solid var(--yb-line);font-size:13px;font-weight:800}.page-yibin .yb-growth-page li span{color:var(--yb-red);font:900 10px/1 system-ui}.page-yibin .yb-growth-page>div{display:flex;flex-wrap:wrap;gap:10px;margin-top:27px}.page-yibin .yb-growth-page a{display:inline-flex;align-items:center;min-height:44px;padding:0 15px;border:1px solid var(--yb-line);color:inherit;text-decoration:none;font-size:12px;font-weight:850}.page-yibin .yb-growth-page a:first-child{background:var(--yb-indigo);color:#fff}

.page-yibin .yb-articles{padding:120px 0;background:#f6f0e5}.page-yibin .yb-articles .yb-section-head .city-eyebrow{color:var(--yb-red)}.page-yibin .yb-articles .yb-section-head>p{color:var(--yb-muted)}.page-yibin .yb-article-shelf{border-top:8px solid var(--yb-ink);border-bottom:8px solid var(--yb-ink)}.page-yibin .yb-article-shelf article{display:grid;grid-template-columns:54px 120px 100px minmax(0,1fr);align-items:center;gap:18px;min-height:94px;padding:16px 18px;border-bottom:1px solid var(--yb-line);border-left:8px solid var(--yb-red);background:rgba(255,250,240,.5);transition:.22s ease}.page-yibin .yb-article-shelf article:nth-child(even){border-left-color:#4d6285;background:#eee5d8}.page-yibin .yb-article-shelf article:last-child{border-bottom:0}.page-yibin .yb-article-shelf article:hover{padding-left:28px}.page-yibin .yb-article-shelf i{color:rgba(63,42,48,.25);font:900 23px/1 system-ui;font-style:normal}.page-yibin .yb-article-shelf span,.page-yibin .yb-article-shelf small{color:#8d7a65;font-size:10px;letter-spacing:.06em}.page-yibin .yb-article-shelf a{color:inherit;text-decoration:none;font-size:17px;font-weight:800;line-height:1.5}.page-yibin .yb-category-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}.page-yibin .yb-category-links a{padding:12px 16px;border:1px solid var(--yb-line);color:inherit;text-decoration:none;font-size:13px;font-weight:800}

.page-yibin .yb-faq{padding:120px 0;background:var(--yb-paper)}.page-yibin .yb-faq-head{display:grid;grid-template-columns:1.15fr .85fr;gap:60px;align-items:end;margin-bottom:42px}.page-yibin .yb-faq-head h2{margin-top:14px}.page-yibin .yb-faq-head>p{margin:0;color:var(--yb-muted);font-size:15px;line-height:1.9}.page-yibin .yb-faq .faq-list{border-top:7px solid var(--yb-red-dark)}.page-yibin .yb-faq details{border-color:var(--yb-line);border-left:7px solid transparent}.page-yibin .yb-faq details[open]{border-left-color:var(--yb-indigo);background:rgba(255,250,240,.5)}.page-yibin .yb-faq summary{position:relative;padding:27px 62px 27px 18px;font-size:18px;font-weight:850}.page-yibin .yb-faq summary::after{content:"＋";position:absolute;right:17px;top:24px;color:var(--yb-red);font:400 25px/1 system-ui}.page-yibin .yb-faq details[open] summary::after{content:"—"}.page-yibin .yb-faq details p{max-width:980px;margin:0;padding:0 62px 27px 18px;color:var(--yb-muted);font-size:14px;line-height:1.9}
.page-yibin .yb-final{padding:78px 0;background:#251a29;color:#fff8ed}.page-yibin .yb-final-spread{display:grid;grid-template-columns:1.12fr .88fr;gap:72px;align-items:end}.page-yibin .yb-final small{color:#d6aa6c;font-size:10px;letter-spacing:.18em}.page-yibin .yb-final h2{margin:17px 0 0;font-size:45px;line-height:1.13;letter-spacing:-.04em}.page-yibin .yb-final p{margin:0;color:rgba(255,248,237,.62);font-size:14px;line-height:1.9}

@media(max-width:1000px){
  .page-yibin .yb-hero-grid{grid-template-columns:1fr 1fr;gap:28px}.page-yibin .yb-hero-copy h1{font-size:52px}.page-yibin .yb-hero-dashboard{margin-right:-65px}.page-yibin .yb-chapter{grid-template-columns:minmax(0,1fr) 42px minmax(0,1fr);gap:0 20px}.page-yibin .yb-platform-spread{grid-template-columns:290px minmax(0,1fr)}.page-yibin .yb-growth-page{padding:46px 35px}
}
@media(max-width:760px){
  .page-yibin .city-shell{width:min(100% - 28px,1180px)}.page-yibin .yb-hero{min-height:0;padding:8px 0 58px}.page-yibin .yb-hero::before{display:none}.page-yibin .city-crumb{padding:12px 0}.page-yibin .yb-hero-grid{display:flex;flex-direction:column;align-items:stretch;gap:24px;padding-top:20px}.page-yibin .yb-hero-copy{padding:8px 0}.page-yibin .yb-hero-copy h1{margin:17px 0 20px;font-size:38px;line-height:1.08}.page-yibin .yb-hero-copy>p:not(.city-eyebrow){font-size:15px;line-height:1.8}.page-yibin .yb-hero-actions a{min-height:45px;padding:0 14px;font-size:12px}
  .page-yibin .yb-hero-visual{order:2;min-height:520px}.page-yibin .yb-hero-visual img{min-height:520px}.page-yibin .yb-hero-visual figcaption{left:14px;right:14px;bottom:14px;grid-template-columns:1fr 34px 1fr;padding:12px}.page-yibin .yb-hero-dashboard{order:3;margin:-45px 14px 0;padding:16px}.page-yibin .yb-dashboard-page{min-height:160px}
  .page-yibin .city-ad{padding:18px 0}.page-yibin .city-ad-inner{width:calc(100% - 20px)}.page-yibin .city-ad img{aspect-ratio:auto}
  .page-yibin .yb-spread{padding:82px 0}.page-yibin .yb-spread-head{grid-template-columns:1fr;gap:18px;margin-bottom:98px}.page-yibin .yb-spread-head>div{grid-template-columns:1fr;gap:17px}.page-yibin .yb-spread-head h2,.page-yibin .yb-chapter h2,.page-yibin .yb-section-head h2,.page-yibin .yb-faq h2{font-size:31px;line-height:1.14}
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  .page-yibin .yb-page-panel{min-height:0;padding:36px 28px}.page-yibin .yb-page-left{order:1}.page-yibin .yb-opening .yb-chapter-image{order:3}.page-yibin .yb-page-right{order:3}.page-yibin .yb-page-panel::after{display:none}.page-yibin .yb-page-list{grid-template-columns:1fr 1fr}.page-yibin .yb-chapter-image{min-height:430px}.page-yibin .yb-chapter-image img{min-height:430px}
  .page-yibin .yb-context-intro,.page-yibin .yb-change-title{grid-template-columns:1fr;gap:18px}.page-yibin .yb-context-tabs{margin-top:30px}.page-yibin .yb-context-tabs button{font-size:11px}.page-yibin .yb-context-spread{grid-template-columns:1fr;min-height:0}.page-yibin .yb-context-spread section{padding:34px 27px}.page-yibin .yb-context-spread h3{margin-top:42px;font-size:22px}.page-yibin .yb-context-spine{height:34px;background:linear-gradient(#e0d1ba,#f8f0e3 48%,#cdbca5)}.page-yibin .yb-context-spine i{top:50%!important;width:6px;height:20px;transform:translate(-50%,-50%)}.page-yibin .yb-context-spine i:nth-child(1){left:25%}.page-yibin .yb-context-spine i:nth-child(2){left:50%}.page-yibin .yb-context-spine i:nth-child(3){left:75%}
  .page-yibin .yb-ledger .yb-chapter-image{order:1}.page-yibin .yb-ledger .yb-book-spine{order:2}.page-yibin .yb-ledger-switch button{font-size:11px}.page-yibin .yb-ledger-result{min-height:210px;padding:26px 20px}
  .page-yibin .yb-revision-grid{grid-template-columns:1fr;gap:28px;background:none}.page-yibin .yb-revision-grid a{min-height:245px;padding:30px 27px}.page-yibin .yb-revision-grid h3{margin-top:50px}.page-yibin .yb-verify{grid-template-columns:1fr;gap:7px}
  .page-yibin .yb-platform,.page-yibin .yb-growth,.page-yibin .yb-articles,.page-yibin .yb-faq{padding:82px 0}.page-yibin .yb-section-head,.page-yibin .yb-faq-head{grid-template-columns:1fr;gap:18px;margin-bottom:32px}.page-yibin .yb-platform-spread{grid-template-columns:1fr;min-height:0}.page-yibin .yb-workspace-books{grid-template-columns:1fr 1fr;border-right:0;border-bottom:10px solid #3a293b}.page-yibin .yb-workspace-books article{min-height:138px;padding:16px 12px}.page-yibin .yb-platform-image{min-height:260px}.page-yibin .yb-platform-image img{min-height:260px}
  .page-yibin .yb-growth-spread{grid-template-columns:1fr;min-height:0}.page-yibin .yb-growth-image{min-height:430px}.page-yibin .yb-growth-image img{min-height:430px}.page-yibin .yb-growth-page{padding:39px 28px;border-left:0;border-top:11px solid var(--yb-red-dark)}.page-yibin .yb-growth-page h3{margin-top:45px;font-size:26px}
  .page-yibin .yb-article-shelf article{grid-template-columns:34px 1fr;gap:8px 12px;padding:18px 12px}.page-yibin .yb-article-shelf span,.page-yibin .yb-article-shelf small{grid-column:2}.page-yibin .yb-article-shelf a{grid-column:1 / -1;font-size:15px}.page-yibin .yb-article-shelf article:hover{padding-left:12px}
  .page-yibin .yb-final{padding:64px 0}.page-yibin .yb-final-spread{grid-template-columns:1fr;gap:28px}.page-yibin .yb-final h2{font-size:31px}
}
@media(max-width:390px){
  .page-yibin .yb-hero-copy h1{font-size:36px}.page-yibin .yb-page-list{grid-template-columns:1fr}.page-yibin .yb-workspace-books{grid-template-columns:1fr}.page-yibin .yb-workspace-books article{min-height:108px}.page-yibin .yb-hero-actions{display:grid;grid-template-columns:1fr 1fr}.page-yibin .yb-dashboard-tabs button{font-size:12px}
}
@media(prefers-reduced-motion:reduce){
  .page-yibin .reveal{opacity:1;transform:none;transition:none}.page-yibin .yb-hero-actions a,.page-yibin .yb-revision-grid a,.page-yibin .yb-article-shelf article{transition:none}
}