.page-baiyin {
  --by-ink: #252526;
  --by-paper: #f4ede0;
  --by-paper-light: #fbf8f1;
  --by-slate: #344a5e;
  --by-slate-dark: #213342;
  --by-copper: #a95f3c;
  --by-copper-dark: #773d28;
  --by-sand: #d8bd93;
  --by-line: rgba(52, 74, 94, .19);
  --by-shadow: 0 24px 64px rgba(38, 43, 47, .12);
  color: var(--by-ink);
  background: var(--by-paper-light);
}

.page-baiyin .city-main { overflow: clip; }
.page-baiyin .city-shell { width: min(1180px, calc(100% - 48px)); margin-inline: auto; }
.page-baiyin .city-crumb { min-height: 56px; display: flex; align-items: center; gap: 10px; color: #6a6e70; font-size: 14px; }
.page-baiyin .city-crumb a { color: inherit; text-decoration: none; }
.page-baiyin .city-crumb strong { color: var(--by-ink); font-weight: 720; }
.page-baiyin .city-eyebrow { margin: 0 0 14px; color: var(--by-copper); font: 750 11px/1.2 ui-monospace, SFMono-Regular, Consolas, monospace; letter-spacing: .16em; text-transform: uppercase; }

.page-baiyin .by-hero { position: relative; min-height: 680px; display: grid; align-items: center; isolation: isolate; background: #eee0cb; }
.page-baiyin .by-hero-picture { position: absolute; z-index: -2; inset: 0; }
.page-baiyin .by-hero-picture::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(248,241,229,.95) 0%, rgba(248,241,229,.78) 34%, rgba(248,241,229,.1) 64%, transparent 100%); }
.page-baiyin .by-hero-picture img { width: 100%; height: 100%; display: block; object-fit: cover; object-position: center; }
.page-baiyin .by-hero-inner { padding-block: 78px 88px; }
.page-baiyin .by-hero-copy { width: min(620px, 55%); }
.page-baiyin .by-kicker { margin: 0 0 22px; padding-left: 48px; position: relative; color: var(--by-copper-dark); font: 780 11px/1 ui-monospace, SFMono-Regular, Consolas, monospace; letter-spacing: .15em; }
.page-baiyin .by-kicker::before { content: ""; position: absolute; left: 0; top: 50%; width: 34px; height: 4px; background: var(--by-copper); box-shadow: 9px 8px 0 rgba(169,95,60,.28); }
.page-baiyin .by-hero h1 { margin: 0; font-size: clamp(51px, 4.35vw, 59px); line-height: 1.08; letter-spacing: -.045em; font-weight: 840; }
.page-baiyin .by-hero h1 em { color: var(--by-slate); font-style: normal; }
.page-baiyin .by-mobile-break { display: none; }
.page-baiyin .by-lead { margin: 27px 0 0; max-width: 57ch; color: #5e625f; font-size: 17px; line-height: 1.92; }
.page-baiyin .by-actions { margin-top: 30px; display: flex; flex-wrap: wrap; gap: 12px; }
.page-baiyin .by-button { min-height: 48px; padding: 0 24px; display: inline-flex; align-items: center; justify-content: center; color: inherit; text-decoration: none; border: 1px solid transparent; font-weight: 780; letter-spacing: .02em; transition: transform .25s ease, background .25s ease, color .25s ease; }
.page-baiyin .by-button:hover { transform: translateY(-2px); }
.page-baiyin .by-button.is-copper { color: #fff; background: var(--by-copper); }
.page-baiyin .by-service-note { margin: 24px 0 0; padding-left: 16px; max-width: 52ch; border-left: 3px solid var(--by-sand); color: #70716d; font-size: 13px; line-height: 1.7; }

.page-baiyin .city-ad { padding: 34px 24px; background: #e9decd; }
.page-baiyin .city-ad.is-dark { background: var(--by-slate-dark); }
.page-baiyin .city-ad-inner { width: min(1200px, 100%); margin: auto; }
.page-baiyin .city-ad picture, .page-baiyin .city-ad img { width: 100%; display: block; }
.page-baiyin .city-ad img { aspect-ratio: 3 / 1; object-fit: contain; }

.page-baiyin .by-timeline { padding: 118px 0 130px; background: linear-gradient(180deg, #fbf8f1 0%, #f1e9dc 100%); }
.page-baiyin .by-section-head { display: grid; grid-template-columns: minmax(0, 1fr) minmax(300px, 430px); gap: 72px; align-items: end; }
.page-baiyin .by-section-head h2 { margin: 0; font-size: clamp(43px, 3.9vw, 47px); line-height: 1.14; letter-spacing: -.042em; }
.page-baiyin .by-section-head > p { margin: 0; color: #616667; font-size: 16px; line-height: 1.9; }
.page-baiyin .by-timeline-layout { margin-top: 70px; display: grid; grid-template-columns: 236px minmax(0, 1fr); gap: 74px; align-items: start; }
.page-baiyin .by-spine-nav { position: sticky; top: 90px; padding: 24px 18px 26px; background: var(--by-slate-dark); color: #fff; box-shadow: var(--by-shadow); }
.page-baiyin .by-spine-nav > p { margin: 0 0 18px; padding: 0 10px 17px; border-bottom: 1px solid rgba(255,255,255,.14); color: #d8bd93; font: 750 11px/1.2 ui-monospace, SFMono-Regular, Consolas, monospace; letter-spacing: .12em; }
.page-baiyin .by-spine-nav button { width: 100%; min-height: 58px; padding: 10px 12px; border: 0; border-left: 4px solid transparent; background: transparent; color: rgba(255,255,255,.65); display: flex; align-items: center; gap: 13px; cursor: pointer; font: inherit; text-align: left; transition: color .25s ease, background .25s ease, border-color .25s ease; }
.page-baiyin .by-spine-nav button b { width: 26px; color: #cf906d; font: 780 11px/1 ui-monospace, SFMono-Regular, Consolas, monospace; }
.page-baiyin .by-spine-nav button span { font-weight: 720; }
.page-baiyin .by-spine-nav button.is-active { border-left-color: var(--by-copper); background: rgba(255,255,255,.08); color: #fff; }
.page-baiyin .by-progress { position: absolute; top: 24px; bottom: 26px; right: 7px; width: 3px; background: rgba(255,255,255,.10); }
.page-baiyin .by-progress i { display: block; width: 100%; height: 20%; background: var(--by-copper); transition: height .3s ease; }
.page-baiyin .by-records { position: relative; min-width: 0; padding-left: 48px; }
.page-baiyin .by-records::before { content: ""; position: absolute; left: 17px; top: 12px; bottom: 0; width: 2px; background: repeating-linear-gradient(to bottom, rgba(52,74,94,.55) 0 22px, transparent 22px 35px); }
.page-baiyin .by-record { position: relative; margin-bottom: 94px; padding: 46px; min-width: 0; scroll-margin-top: 112px; background: #fffdf7; border: 1px solid rgba(52,74,94,.12); box-shadow: 0 16px 44px rgba(41,46,48,.07); transition: box-shadow .25s ease, border-color .25s ease; }
.page-baiyin .by-record:last-child { margin-bottom: 0; }
.page-baiyin .by-record.is-current { border-color: rgba(169,95,60,.5); box-shadow: 0 25px 64px rgba(80,52,37,.13); }
.page-baiyin .by-record-dot { position: absolute; z-index: 2; top: 42px; left: -54px; width: 46px; aspect-ratio: 1; display: grid; place-items: center; color: var(--by-slate); background: var(--by-paper-light); border: 2px solid var(--by-slate); border-radius: 50%; box-shadow: 0 0 0 8px #f1e9dc; }
.page-baiyin .by-record-dot b { font: 800 10px/1 ui-monospace, SFMono-Regular, Consolas, monospace; }
.page-baiyin .by-record.is-current .by-record-dot { color: #fff; background: var(--by-copper); border-color: var(--by-copper); }
.page-baiyin .by-record > header > p { margin: 0 0 15px; color: var(--by-copper); font: 750 10px/1.2 ui-monospace, SFMono-Regular, Consolas, monospace; letter-spacing: .15em; }
.page-baiyin .by-record > header h2 { margin: 0; font-size: clamp(40px, 3.5vw, 45px); line-height: 1.14; letter-spacing: -.04em; }
.page-baiyin .by-record > header > span { margin-top: 19px; max-width: 62ch; display: block; color: #656a69; font-size: 16px; line-height: 1.85; }
.page-baiyin .by-record > figure { margin: 34px 0 0; padding: 10px; background: #efe5d5; }
.page-baiyin .by-record > figure img { width: 100%; height: auto; aspect-ratio: 3 / 2; object-fit: cover; display: block; }
.page-baiyin .by-record > figure figcaption { padding: 11px 6px 2px; color: #797a75; font: 700 10px/1.4 ui-monospace, SFMono-Regular, Consolas, monospace; letter-spacing: .09em; }
.page-baiyin .by-four-checks { margin-top: 22px; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 2px; background: var(--by-line); }
.page-baiyin .by-four-checks section { padding: 22px; background: var(--by-paper-light); }
.page-baiyin .by-four-checks b { color: var(--by-slate-dark); }
.page-baiyin .by-four-checks p { margin: 8px 0 0; color: #686d6c; font-size: 14px; line-height: 1.72; }
.page-baiyin .by-inline-links { margin-top: 22px; display: flex; flex-wrap: wrap; gap: 18px; }
.page-baiyin .by-inline-links a, .page-baiyin .by-text-link, .page-baiyin .by-policy-note a, .page-baiyin .by-growth-grid a { color: var(--by-copper-dark); text-decoration: none; font-weight: 760; border-bottom: 1px solid rgba(169,95,60,.42); }
.page-baiyin .by-permit-grid { margin-top: 32px; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.page-baiyin .by-permit-grid section { min-height: 210px; padding: 26px; background: #f7f1e6; border: 1px solid rgba(52,74,94,.11); }
.page-baiyin .by-permit-grid i { width: 34px; height: 8px; display: block; overflow: hidden; color: transparent; background: var(--by-copper); box-shadow: 13px 7px 0 rgba(169,95,60,.25); }
.page-baiyin .by-permit-grid h3 { margin: 22px 0 0; font-size: 20px; }
.page-baiyin .by-permit-grid p { margin: 10px 0 0; color: #666b6a; line-height: 1.78; }
.page-baiyin .by-policy-note { margin-top: 18px; padding: 28px; border-left: 5px solid var(--by-copper); background: var(--by-slate-dark); color: #fff; }
.page-baiyin .by-policy-note b { color: #e1c08d; }
.page-baiyin .by-policy-note p { margin: 12px 0 16px; color: rgba(255,255,255,.72); line-height: 1.78; }
.page-baiyin .by-policy-note a { color: #fff; border-color: rgba(255,255,255,.4); }
.page-baiyin .by-month-list { margin: 24px 0 26px; padding: 0; list-style: none; counter-reset: record; }
.page-baiyin .by-month-list li { counter-increment: record; padding: 17px 0; border-top: 1px solid var(--by-line); display: grid; grid-template-columns: 128px 1fr; gap: 20px; }
.page-baiyin .by-month-list b { color: var(--by-slate-dark); }
.page-baiyin .by-month-list b::before { content: "0" counter(record) " "; color: var(--by-copper); font: 780 10px/1 ui-monospace, SFMono-Regular, Consolas, monospace; }
.page-baiyin .by-month-list span { color: #696d6c; line-height: 1.72; }
.page-baiyin .by-platform-record { color: #fff; background: var(--by-slate-dark); border-color: transparent; }
.page-baiyin .by-platform-record > header > span { color: rgba(255,255,255,.69); }
.page-baiyin .by-platform-record > figure { background: #111b23; }
.page-baiyin .by-platform-record > figure figcaption { color: rgba(255,255,255,.55); }
.page-baiyin .by-workspaces { margin-top: 16px; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 2px; background: rgba(255,255,255,.12); }
.page-baiyin .by-workspaces section { padding: 24px; background: #2c4253; }
.page-baiyin .by-workspaces b { color: #dfb77e; font-size: 19px; }
.page-baiyin .by-workspaces p { margin: 8px 0 0; color: rgba(255,255,255,.7); line-height: 1.72; }
.page-baiyin .by-platform-boundary { margin: 18px 0 0; color: rgba(255,255,255,.58); font-size: 13px; line-height: 1.7; }
.page-baiyin .by-growth-grid { margin-top: 22px; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.page-baiyin .by-growth-grid section { padding: 25px; border-top: 4px solid var(--by-copper); background: var(--by-paper-light); }
.page-baiyin .by-growth-grid span { color: var(--by-copper); font: 750 10px/1 ui-monospace, SFMono-Regular, Consolas, monospace; letter-spacing: .12em; }
.page-baiyin .by-growth-grid h3 { margin: 14px 0 0; font-size: 20px; }
.page-baiyin .by-growth-grid p { margin: 9px 0 14px; color: #666b69; line-height: 1.72; }

.page-baiyin .by-articles { padding: 116px 0; background: #eee4d4; }
.page-baiyin .by-article-shelves { margin-top: 48px; border-top: 1px solid rgba(52,74,94,.22); }
.page-baiyin .by-article-shelves a { min-width: 0; padding: 26px 18px; display: grid; grid-template-columns: 54px 130px minmax(0, 1fr) 90px; gap: 20px; align-items: center; color: inherit; text-decoration: none; border-bottom: 1px solid rgba(52,74,94,.22); transition: color .25s ease, background .25s ease, padding .25s ease; }
.page-baiyin .by-article-shelves a:hover { padding-inline: 28px; color: #fff; background: var(--by-slate-dark); }
.page-baiyin .by-article-shelves b { color: var(--by-copper); font: 800 12px/1 ui-monospace, SFMono-Regular, Consolas, monospace; }
.page-baiyin .by-article-shelves span { color: #777b79; font-size: 13px; }
.page-baiyin .by-article-shelves h3 { margin: 0; font-size: 20px; line-height: 1.55; }
.page-baiyin .by-article-shelves i { color: var(--by-copper); font-style: normal; font-weight: 760; text-align: right; }

.page-baiyin .by-faq { padding: 116px 0; background: #faf7f0; }
.page-baiyin .by-faq-list { margin-top: 48px; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.page-baiyin .by-faq-list details { min-width: 0; background: #f1eadf; border: 1px solid rgba(52,74,94,.13); }
.page-baiyin .by-faq-list summary { position: relative; padding: 27px 62px 27px 28px; cursor: pointer; list-style: none; font-size: 18px; line-height: 1.55; font-weight: 760; }
.page-baiyin .by-faq-list summary::-webkit-details-marker { display: none; }
.page-baiyin .by-faq-list summary::after { content: ""; position: absolute; top: 30px; right: 28px; width: 15px; height: 15px; border-right: 2px solid var(--by-copper); border-bottom: 2px solid var(--by-copper); transform: rotate(45deg); transition: transform .25s ease; }
.page-baiyin .by-faq-list details[open] summary::after { transform: rotate(225deg); top: 37px; }
.page-baiyin .by-faq-list p { margin: 0; padding: 0 28px 28px; color: #626766; line-height: 1.85; }

.page-baiyin .by-final { padding: 78px 0; color: #fff; background: var(--by-copper-dark); }
.page-baiyin .by-final .city-shell { display: grid; grid-template-columns: minmax(0, 1fr) minmax(300px, .8fr); gap: 72px; align-items: center; }
.page-baiyin .by-final .city-eyebrow { color: #e3c28f; }
.page-baiyin .by-final h2 { margin: 0; font-size: 42px; line-height: 1.17; letter-spacing: -.04em; }
.page-baiyin .by-final p { margin: 0; color: rgba(255,255,255,.76); line-height: 1.9; }

.page-baiyin .by-reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s cubic-bezier(.2,.7,.2,1); }
.page-baiyin .by-reveal.is-visible { opacity: 1; transform: none; }

@media (max-width: 980px) {
  .page-baiyin .by-hero-copy { width: min(620px, 62%); }
  .page-baiyin .by-section-head { gap: 34px; }
  .page-baiyin .by-timeline-layout { grid-template-columns: 190px minmax(0, 1fr); gap: 46px; }
  .page-baiyin .by-record { padding: 36px; }
  .page-baiyin .by-permit-grid { grid-template-columns: 1fr; }
}

@media (max-width: 700px) {
  .page-baiyin .city-shell { width: min(100% - 30px, 1180px); }
  .page-baiyin .city-crumb { min-height: 48px; font-size: 13px; }
  .page-baiyin .by-hero { min-height: 720px; align-items: start; }
  .page-baiyin .by-hero-picture::after { background: linear-gradient(180deg, rgba(249,245,237,.98) 0%, rgba(249,245,237,.88) 45%, rgba(249,245,237,.18) 75%, transparent 100%); }
  .page-baiyin .by-hero-picture img { object-position: center bottom; }
  .page-baiyin .by-hero-inner { padding-block: 44px 46px; }
  .page-baiyin .by-hero-copy { width: 100%; }
  .page-baiyin .by-kicker { margin-bottom: 18px; }
  .page-baiyin .by-hero h1 { font-size: 38px; line-height: 1.09; }
  .page-baiyin .by-mobile-break { display: inline; }
  .page-baiyin .by-lead { margin-top: 18px; max-width: 35ch; font-size: 15px; line-height: 1.72; }
  .page-baiyin .by-actions { margin-top: 22px; }
  .page-baiyin .by-button { min-height: 44px; padding-inline: 20px; font-size: 14px; }
  .page-baiyin .by-service-note { margin-top: 18px; font-size: 12px; }
  .page-baiyin .city-ad { padding: 24px 15px; }
  .page-baiyin .city-ad img { aspect-ratio: 750 / 920; object-fit: contain; }
  .page-baiyin .by-timeline, .page-baiyin .by-articles, .page-baiyin .by-faq { padding: 78px 0; }
  .page-baiyin .by-section-head { display: block; }
  .page-baiyin .by-section-head h2, .page-baiyin .by-record > header h2 { font-size: 31px; line-height: 1.18; }
  .page-baiyin .by-section-head > p { margin-top: 22px; font-size: 15px; }
  .page-baiyin .by-timeline-layout { margin-top: 38px; display: block; }
  .page-baiyin .by-spine-nav { position: relative; top: auto; padding: 7px; display: flex; overflow-x: auto; scrollbar-width: none; }
  .page-baiyin .by-spine-nav::-webkit-scrollbar { display: none; }
  .page-baiyin .by-spine-nav > p, .page-baiyin .by-progress { display: none; }
  .page-baiyin .by-spine-nav button { flex: 0 0 auto; width: auto; min-height: 48px; padding: 9px 15px; border-left: 0; border-bottom: 3px solid transparent; }
  .page-baiyin .by-spine-nav button.is-active { border-bottom-color: var(--by-copper); }
  .page-baiyin .by-records { margin-top: 42px; padding-left: 20px; }
  .page-baiyin .by-records::before { left: 0; }
  .page-baiyin .by-record { margin-bottom: 62px; padding: 28px 18px; scroll-margin-top: 20px; }
  .page-baiyin .by-record-dot { top: 25px; left: -36px; width: 34px; box-shadow: 0 0 0 5px #f1e9dc; }
  .page-baiyin .by-record > header > span { margin-top: 15px; font-size: 15px; }
  .page-baiyin .by-record > figure { margin-top: 24px; padding: 7px; }
  .page-baiyin .by-four-checks, .page-baiyin .by-workspaces, .page-baiyin .by-growth-grid { grid-template-columns: 1fr; }
  .page-baiyin .by-permit-grid { margin-top: 24px; }
  .page-baiyin .by-permit-grid section { min-height: 0; padding: 22px; }
  .page-baiyin .by-month-list li { grid-template-columns: 95px 1fr; gap: 10px; font-size: 14px; }
  .page-baiyin .by-article-shelves { margin-top: 34px; }
  .page-baiyin .by-article-shelves a { padding: 24px 18px; display: grid; grid-template-columns: 42px 1fr; gap: 8px 12px; }
  .page-baiyin .by-article-shelves span { grid-column: 2; }
  .page-baiyin .by-article-shelves h3 { grid-column: 1 / -1; margin-top: 8px; font-size: 18px; }
  .page-baiyin .by-article-shelves i { grid-column: 1 / -1; text-align: left; margin-top: 8px; }
  .page-baiyin .by-article-shelves a:hover { padding-inline: 18px; }
  .page-baiyin .by-faq-list { margin-top: 34px; grid-template-columns: 1fr; }
  .page-baiyin .by-faq-list summary { padding: 22px 54px 22px 20px; font-size: 17px; }
  .page-baiyin .by-faq-list summary::after { top: 25px; right: 20px; }
  .page-baiyin .by-faq-list details[open] summary::after { top: 31px; }
  .page-baiyin .by-faq-list p { padding: 0 20px 22px; font-size: 15px; }
  .page-baiyin .by-final { padding: 58px 0; }
  .page-baiyin .by-final .city-shell { display: block; }
  .page-baiyin .by-final h2 { font-size: 31px; }
  .page-baiyin .by-final p { margin-top: 20px; }
}

@media (prefers-reduced-motion: reduce) {
  .page-baiyin *, .page-baiyin *::before, .page-baiyin *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .page-baiyin .by-reveal { opacity: 1; transform: none; }
}