@charset "UTF-8";
:root{--paper:#fff;--white:#fff;--ink:#262626;--muted:#5b6472;--line:#e6e8ed;--wine:#000000;--soft:#f4f5f8;--green:#1f6b4a;--red:#ffd400;--accent:#ffd400;--serif:var(--sans);--sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:20px}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);line-height:1.65;font-size:16px}a{color:inherit;text-decoration:none}a:hover{text-decoration:underline;text-underline-offset:5px}button,input,select,textarea{font:inherit}button,a,input,select,summary{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.48}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #000000;outline-offset:4px}button{color:inherit}img,svg{max-width:100%;height:auto}h1,h2,h3,h4,p{margin:0}h1,h2,h3{font-family:var(--serif);font-weight:700;line-height:1.35}h1{font-size:clamp(32px,4vw,48px);letter-spacing:-.035em}h2{font-size:clamp(24px,2.5vw,32px)}h3{font-size:24px}p+p{margin-top:16px}ul,ol{padding-left:24px}li+li{margin-top:8px}small{font-size:12px}main{max-width:1240px;margin:auto;min-height:60vh;padding:28px 36px 80px}main:focus{outline:none}.edition{max-width:1240px;margin:auto;padding:8px 36px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;font-size:12px;letter-spacing:1.6px;color:var(--muted)}.edition a{letter-spacing:.5px}.masthead{max-width:1240px;margin:auto;padding:24px 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p{font-size:12px}.case-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px}.case-card{border-bottom:1px solid var(--line);padding-bottom:24px;min-width:0}.case-card h3{margin:16px 0 12px;font-size:24px}.case-card p{color:var(--muted);font-size:14px;margin:12px 0}.case-card .meta{font-size:12px}.case-art{height:170px;background:#e9e6dd;display:flex;align-items:center;justify-content:center;overflow:hidden;position:relative}.case-art .art-type{position:absolute;left:12px;top:10px;font:12px var(--sans);letter-spacing:1.5px;color:#5e5b53}.art-monogram{font:700 64px var(--sans);color:var(--wine);letter-spacing:-5px;opacity:.8}.art-lines{position:absolute;width:70%;height:70%;border-top:1px solid #beb5a8;border-bottom:1px solid #beb5a8;transform:rotate(-9deg)}.case-card:nth-child(3n+2) .case-art{background:#e4e8e4}.case-card:nth-child(3n+3) .case-art{background:#eee3df}.number-row{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}.number-row 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p{font-size:12px;color:var(--muted)}.slot strong{font-size:14px}.slot button{margin-left:auto;background:none;border:1px solid var(--line);min-height:44px;font-size:12px;padding:8px}.step-image{border:1px solid var(--line);background:#fffdf9;width:100%;display:block}.step-label{font-size:12px;color:var(--muted);padding:12px 0}.step-nav{display:flex;justify-content:space-between;gap:12px;margin-top:20px}.step-nav .button{max-width:48%}.toc{list-style:none;padding:0}.toc li{margin:0;border-bottom:1px solid var(--line)}.toc a{display:block;padding:16px 0;font-size:14px}.toc a.active{color:var(--wine);font-weight:700}.pill-number{font-family:var(--sans);color:var(--wine);margin-right:16px}.resource-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}.resource{padding:24px;border-top:2px solid var(--ink);background:var(--white)}.resource h3{font-size:24px;margin-bottom:12px}.resource p{font-size:14px;color:var(--muted)}.timeline{max-width:820px}.timeline article{display:grid;grid-template-columns:110px 1fr;gap:24px;padding:24px 0;border-bottom:1px solid var(--line)}.timeline time{font:14px var(--sans);color:var(--muted)}.timeline h3{font-size:24px;margin-bottom:12px}.timeline p{font-size:14px;color:var(--muted)}.placeholder{border:1px dashed #aba291;padding:36px;text-align:center;background:var(--soft)}.placeholder .symbol{font:40px var(--sans);color:var(--wine);display:block;margin-bottom:16px}.placeholder p{font-size:14px;color:var(--muted)}details{border-bottom:1px solid var(--line);padding:0}summary{cursor:pointer;min-height:58px;padding:20px 28px 20px 0;font-weight:600;font-size:14px}details p{padding:0 0 24px;color:var(--muted);font-size:14px;max-width:900px}.table-wrap{max-width:100%;overflow:auto;border:1px solid var(--line)}table{width:100%;border-collapse:collapse;font-size:12px;background:var(--white);text-align:left}th,td{padding:16px 16px;border-bottom:1px solid var(--line);vertical-align:top}th{white-space:nowrap;background:var(--soft);font-weight:500}td{min-width:115px}td button{font-size:12px;min-height:44px;background:none;border:1px solid var(--line);padding:4px 12px}.tour-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.tour-grid section{padding:24px;background:var(--white);border-top:2px solid var(--ink)}.tour-grid h3{font-size:20px;margin-bottom:12px}.tour-grid a{display:block;min-height:42px;color:var(--wine);font-size:14px;padding:8px 0;border-bottom:1px solid var(--line)}.footer{max-width:1172px;margin:auto;border-top:1px solid var(--line);padding:32px 0 24px;display:grid;grid-template-columns:2fr 1fr;gap:24px}.footer strong{font:24px var(--serif)}.footer p{font-size:12px;color:var(--muted);margin-top:12px}.footer small{color:var(--muted)}.footer-links{display:grid;grid-template-columns:repeat(2,1fr);gap:8px;font-size:12px}.footer-links a,.footer-links button{min-height:34px;text-align:left}.footer-links button{border:0;background:none;padding:0;font-size:12px;color:var(--wine)}.demo-foot{grid-column:1/-1;border-top:1px solid var(--line);padding-top:20px}.mobile-dock{display:none}.toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%) translateY(20px);padding:12px 24px;background:var(--ink);color:var(--white);font-size:14px;z-index:50;max-width:90vw;width:max-content;opacity:0;pointer-events:none;transition:opacity .15s,transform .15s}.toast.visible{opacity:1;transform:translateX(-50%) translateY(0)}dialog{border:1px solid var(--ink);border-top:5px solid var(--wine);background:var(--paper);color:var(--ink);width:min(520px,calc(100% - 32px));max-height:85vh;padding:36px 32px;overflow:auto}dialog::backdrop{background:#17171299}.dialog-close{position:absolute;right:10px;top:5px;border:0;background:none;font-size:28px;width:44px;height:44px}dialog h2{font-size:28px;margin-bottom:16px;padding-right:16px}dialog p{font-size:14px;margin:12px 0 20px}dialog .button{margin-right:8px;margin-top:12px}
.payment-actions{display:flex;flex-direction:column;gap:10px;margin-top:16px}
.payment-actions .button,.payment-actions button{width:100%;margin:0;min-height:48px;font-size:15px}
button.wxpay-open{background:var(--wine);color:#fff;border:1px solid var(--wine);display:inline-flex;justify-content:center;align-items:center;border-radius:var(--radius);font-weight:600;cursor:pointer;padding:12px 20px}.skip{position:fixed;top:-100px;left:10px;z-index:99;padding:12px;background:var(--ink);color:#fff}.skip:focus{top:10px}.hidden{display:none!important}.no-wrap{white-space:nowrap}
@media(min-width:1600px){main{padding-top:36px}.masthead{padding-top:32px;padding-bottom:32px}}
@media(max-width:1050px){.main-nav{margin:0 28px;gap:20px}.header-actions{gap:12px}.hero-grid{grid-template-columns:1.6fr 1fr;gap:24px}.lead-story{padding-right:24px}.footer{margin:0 36px}.article-layout{gap:32px}.case-grid{gap:20px}.plan{padding:24px 20px}.wordmark{font-size:28px}}
@media(max-width:760px){main{padding:24px 20px 44px}.edition{padding:8px 20px;font-size:12px;letter-spacing:.7px}.edition span{max-width:55%}.masthead{padding:20px 20px;gap:12px}.wordmark{font-size:20px;gap:8px;letter-spacing:0}.wordmark small{font-size:12px;letter-spacing:1.8px;margin-top:8px}.seal{min-width:37px;width:37px;height:43px;font-size:16px}.header-actions>a{display:none}.menu-toggle{display:block;font-size:12px;padding:8px 12px}.main-nav{margin:0 20px;gap:0;justify-content:space-between;flex-wrap:wrap;min-height:44px}.main-nav a{font-size:12px;min-height:44px;padding:12px 8px}.main-nav a:nth-child(n+5){display:none}.main-nav.expanded a:nth-child(n+5){display:block}.main-nav.expanded{justify-content:start}.main-nav.expanded a{width:25%;text-align:center}.hero-grid{grid-template-columns:1fr;gap:24px}.lead-story{border-right:0;padding:0}.lead-story h1{font-size:40px;max-width:600px}.hero-art{margin-top:20px}.hero-art img{max-height:240px}.hero-grid>aside{display:grid;grid-template-columns:1fr 1fr;gap:24px;border-top:1px solid var(--line);padding-top:20px}.side-story+.side-story{margin:0;padding:0;border:0}.side-story h3{font-size:20px}.side-note{display:none}.case-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px 20px}.case-card h3{font-size:20px}.case-art{height:135px}.art-monogram{font-size:48px}.number-row{gap:20px}.number-row article{padding-left:16px}.number-row h3{font-size:18px}.type-row{gap:12px}.type-row:nth-child(even){padding-left:16px}.banner{padding:28px;align-items:start;flex-direction:column;gap:20px}.section-head{margin-top:36px}.section-head h2{font-size:24px}.plans{grid-template-columns:1fr}.plan+.plan{border-left:1px solid var(--line);border-top:0}.plan.featured{border-top:4px solid var(--wine)}.plan ul{columns:2;column-gap:32px}.plan li{break-inside:avoid}.article-layout,.split,.selection-grid{grid-template-columns:1fr;gap:28px}.sticky-side{position:static}.article-layout>aside{border-top:1px solid var(--line);padding-top:20px}.article-layout .fact-box{display:block}.article-copy p{font-size:16px}.stat-grid{grid-template-columns:repeat(2,1fr)}.stat:nth-child(2){border:0}.stat:nth-child(-n+2){border-bottom:1px solid var(--line)}.footer{margin:0 20px;padding-bottom:100px;grid-template-columns:1fr}.footer-links{gap:8px}.mobile-dock{display:flex;position:fixed;bottom:0;left:0;right:0;background:var(--paper);border-top:1px solid var(--ink);height:calc(59px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);z-index:20}.mobile-dock a{display:grid;place-content:center;flex:1;font-size:12px;min-height:55px}.mobile-dock a[aria-current="page"]{color:var(--wine);font-weight:700;border-top:3px solid var(--wine);margin-top:-1px}.toast{bottom:85px}.tour-grid{grid-template-columns:repeat(2,1fr)}.toolbar .field:first-child{flex-basis:100%}.timeline article{grid-template-columns:80px 1fr;gap:16px}.timeline h3{font-size:20px}.list-row{align-items:start}.list-row .actions{flex-direction:column}.resource-grid{gap:20px}.resource{padding:20px}.swipe-panel{padding:24px}.panel{padding:24px}.page-head .lede{font-size:16px}}
@media(max-width:420px){main{padding-left:16px;padding-right:16px}.masthead{padding:16px 16px}.edition{padding-left:16px;padding-right:16px}.wordmark{font-size:18px}.wordmark small{font-size:12px;letter-spacing:1.3px}.seal{min-width:32px;width:32px;height:39px;font-size:14px}.menu-toggle{font-size:12px;padding:4px 8px}.main-nav{margin:0 16px}.main-nav a{padding:12px 3px;font-size:12px}.lead-story h1{font-size:32px}.lede{font-size:16px}.hero-grid>aside{gap:16px}.side-story h3{font-size:18px}.side-story p{font-size:12px}.case-grid{grid-template-columns:1fr}.case-card{display:grid;grid-template-columns:100px 1fr;gap:0 16px}.case-card>.case-art{grid-column:1;grid-row:1/5;height:108px}.case-card>div:not(.case-art),.case-card>h3,.case-card>p,.case-card>a,.case-card>.meta{grid-column:2}.case-card h3{font-size:20px;margin:8px 0}.case-card .art-monogram{font-size:32px;letter-spacing:-2px}.case-card .art-type{font-size:12px;left:6px;top:7px}.case-card p{margin:8px 0}.number-row{grid-template-columns:1fr;gap:24px}.number-row article{display:grid;grid-template-columns:40px 1fr;gap:2px 20px}.big-number{grid-row:1/3;font-size:32px;margin:0}.number-row p{grid-column:2}.type-grid{grid-template-columns:1fr}.type-row:nth-child(even){border-left:0;padding-left:0}.resource-grid,.tour-grid{grid-template-columns:1fr}.section-head{gap:12px}.section-head h2{font-size:24px}.section-head a{font-size:12px}.plan ul{columns:auto}.tabs a{padding:12px 12px}.list-row{flex-direction:column;gap:12px}.list-row .actions{flex-direction:row;flex-wrap:wrap}.timeline article{grid-template-columns:1fr;gap:8px}.auth-links{gap:8px;font-size:12px}.footer{margin:0 16px}.swipe-panel h2{font-size:28px}.button{padding:12px 16px}.notice{padding:16px}.breadcrumb{font-size:12px}.art-monogram{font-size:40px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}

.brand-logo{height:54px;width:auto;max-width:100%;display:block}
.footer-logo{height:46px;margin-bottom:12px}
.wordmark:hover{text-decoration:none}
.main-nav a[aria-current="page"]{box-shadow:inset 0 -2px 0 #000}
.page-head .eyebrow:after{content:"";display:block;width:24px;height:4px;background:var(--accent);margin:12px 0 16px}
.page-head h1{font-weight:600;letter-spacing:-.02em}
.section-head{border-top:0}
.section-head h2{color:#000000;font-weight:600}
.case-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px 16px 20px}
.case-art{border-radius:var(--radius)}
.plans{gap:16px}
.plan{border-radius:var(--radius);background:#f5f6f8;border:1px solid #e4e7ee;box-shadow:0 10px 28px #0000000d}
.plan+.plan{border-left:1px solid #e4e7ee}
.plan.featured{border-top:4px solid var(--accent);background:linear-gradient(180deg,#fffaf0,#f5f6f8 46%);padding-top:24px}
.article-copy h2:after{content:"";display:block;width:25px;height:2px;background:#000000;margin-top:8px}
.article-copy .quote{border-left:4px solid var(--accent)}
.fact-box{background:#f4f5f8;border-radius:var(--radius);padding:24px 24px 8px;border-top:0}
.lock-box,.panel,.resource,.swipe-panel,.source{border-radius:var(--radius)}
.lock-box{background:#f4f5f8;border:1px solid #e4e7ee}
.banner{border-radius:var(--radius)}
@media(max-width:760px){.masthead{align-items:center;gap:8px}.wordmark{flex:1;min-width:0}.brand-logo{height:auto;max-height:32px;max-width:100%;width:auto}.footer-logo{max-height:40px;height:auto}.header-actions{gap:8px;flex-shrink:0}.button.compact{padding:8px 12px}}
.article-copy .section-lead{color:#5b6472;font-size:16px;line-height:1.85;max-width:68ch}
.article-copy .point{padding:20px 0 4px}
.article-copy .point+.point{border-top:1px solid #e8ebf0;margin-top:12px}
.article-copy .point h3{font-size:18px;font-weight:600;line-height:1.45;color:#000000;margin:0 0 8px}
.article-copy .point p{margin:0;font-size:16px;line-height:1.9;max-width:68ch}
.article-copy section>h2+p,.article-copy section>p.section-lead+div,.article-copy>section>p{max-width:68ch}
.case-gallery{margin:8px 0 36px}
.case-slides{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;scroll-behavior:smooth;border-radius:var(--radius);background:#f4f5f8;border:1px solid #e6e8ed}
.case-slides:focus-visible{outline:3px solid #000000;outline-offset:4px}
.case-slide{flex:0 0 100%;scroll-snap-align:start;margin:0}
.case-slide img,.case-inline img{display:block;width:100%;height:min(520px,68vw);object-fit:contain;object-position:center top;background:#f4f5f8}
.case-slide figcaption,.case-inline figcaption{font-size:14px;line-height:1.7;color:#5b6472;padding:16px 32px 8px;text-align:center}
.case-slide-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:12px}
.case-slide-bar button{min-height:42px;padding:8px 16px;background:#fff;border:1px solid #c5ceda;border-radius:var(--radius);font-size:14px}
.case-slide-bar button:hover{background:#f4f7fb}
.case-slide-bar span{font-size:14px;color:#5b6472;letter-spacing:.04em}
.case-inline{margin:24px 0 4px}
.case-inline img{border-radius:var(--radius);border:1px solid #e6e8ed;height:auto;max-height:480px}
@media(max-width:760px){.case-slide img{height:min(280px,70vw)}.case-slide-bar button{padding:8px 12px;font-size:14px}}
.price-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:4px 0 16px}
.price-grid div{background:#f4f5f8;border-radius:var(--radius);padding:16px 16px 16px}
.price-grid strong{display:block;color:#000000;font-size:14px;letter-spacing:.04em;margin-bottom:8px}
.price-grid p{margin:0;font-size:14px;line-height:1.75;max-width:none}
.price-scale{font-size:16px;line-height:1.85;max-width:68ch}
.price-shot{margin:0 0 20px}
.price-shot img{display:block;width:100%;max-height:560px;object-fit:contain;object-position:center top;background:#f4f5f8;border:1px solid #e6e8ed;border-radius:var(--radius)}
.price-shot figcaption{margin-top:12px;font-size:14px;line-height:1.7;color:#5b6472;max-width:68ch}
@media(max-width:760px){.price-grid{grid-template-columns:1fr}}
.bench-kicker{color:#000000;font-weight:700;font-size:18px;margin:12px 0 8px}
.bench-needs{margin:16px 0 16px;padding-left:1.25em;max-width:68ch}
.bench-needs li{margin-top:8px}
.case-card .tag.pay{color:#111;background:var(--accent);border-color:var(--accent)}
.buyer-mark{display:inline-flex;align-items:center;gap:4px;height:24px;box-sizing:border-box;padding:0 10px 0 3px;border-radius:var(--radius);line-height:1;vertical-align:middle;background:#f1f2f4}
.buyer-mark i{width:18px;height:18px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;font-style:normal;font-weight:700;font-size:12px;color:#fff;background:#111}
.buyer-mark em{font-style:normal;font-size:12px;letter-spacing:.04em;color:#3c4450}
.buyer-mark.is-c i{background:#8a9099}
.buyer-mark.is-b i{background:#111}
.buyer-mark.is-both i:first-of-type{background:#111}
.buyer-mark.is-both i:nth-of-type(2){background:#8a9099;margin-left:-8px;box-shadow:0 0 0 2px #f1f2f4}
.buyer-row{margin:8px 0 12px}
.case-card .buyer-mark{margin-left:2px}

/* Case library covers: use each project's real interface/result image, never letter art. */
.case-cover-link{display:block;text-decoration:none}
.case-cover-link:hover{text-decoration:none}
.case-art{height:auto;aspect-ratio:16/9;background:#eef1f4;border:1px solid #e4e7ec;display:block}
.case-art img{display:block;width:100%;height:100%;object-fit:cover;object-position:center top;transition:transform .25s ease}
.case-cover-link:hover .case-art img{transform:scale(1.02)}
.case-art-fallback{display:none;height:100%;padding:24px;align-content:center;color:#313846;background:#f1f3f6}
.case-art-fallback strong{display:block;font-size:16px;font-weight:600;line-height:1.5}
.case-art-fallback small{display:block;margin-top:8px;color:#687180;font-size:12px}
.case-art.is-missing img{display:none}
.case-art.is-missing .case-art-fallback{display:grid}
.case-card h3{font-family:var(--sans);font-size:24px;font-weight:600;line-height:1.42;letter-spacing:0}
@media(max-width:760px){.case-card h3{font-size:20px}.case-art{height:auto}}
@media(max-width:420px){.case-card>.case-cover-link{grid-column:1;grid-row:1/5}.case-card>.case-cover-link .case-art{height:108px;aspect-ratio:auto}.case-card h3{font-size:18px;line-height:1.42}}
.payment-qr{display:block;width:min(320px,80vw);height:auto;margin:20px auto;border:1px solid #d9dde5;background:#fff;padding:12px;border-radius:var(--radius)}
.binding-panel{min-height:420px}.binding-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:28px;align-items:start}.member-qr{display:block;width:min(260px,70vw);height:auto;margin:20px 0;padding:8px;background:#fff;border:1px solid #d9dde5;border-radius:var(--radius)}.wecom-card{display:flex;align-items:center;justify-content:space-between;gap:24px;margin:32px 0;padding:24px;border:1px solid #dce2eb;border-radius:var(--radius);background:#f4f7fb}.wecom-card p{margin:4px 0 0;color:#5b6472}.wecom-card img{width:132px;height:132px;object-fit:contain;background:#fff;border-radius:var(--radius)}.wecom-card.compact{margin-top:20px;padding:20px}.wecom-card.pending{border-style:dashed}.case-discussion{margin:52px 0 0;padding:36px;border:1px solid #e2e6ed;border-radius:var(--radius);background:#fff}.case-discussion textarea{display:block;width:100%;min-height:130px;margin:8px 0 16px;padding:16px;border:1px solid #cbd2dc;border-radius:var(--radius);font:inherit}.comment-item{padding:20px 0;border-top:1px solid #e7eaf0}.comment-item strong{color:#000000}.comment-item time{margin-left:12px;color:#7b8390;font-size:12px}.comment-item p{margin:8px 0 0}.notice.success{border-color:#7ec49a;background:#f1fbf5}
@media(max-width:760px){.binding-grid{grid-template-columns:1fr}.wecom-card{display:block}.wecom-card img{display:block;margin:16px 0}.case-discussion{padding:24px 20px}.case-discussion .section-head{display:block}.case-discussion .section-head>a{display:inline-block;margin-top:8px}}

/* opc-footer-black */
.footer{max-width:none;margin:0;background:#000;color:#fff;border-top:0;padding:34px max(24px,calc((100vw - 1172px)/2)) 28px}
.footer p,.footer small,.footer .demo-foot{color:rgba(255,255,255,.78)}
.footer a,.footer-links a,.footer-links button{color:#fff}
.footer .footer-logo{background:transparent}
@media(max-width:760px){.footer{margin:0;padding-bottom:100px}}
.learn-panel-head{display:flex;align-items:flex-start;justify-content:space-between;gap:24px}.learn-panel-head h2{margin-bottom:20px}.official-follow{width:148px;flex:0 0 148px;margin:0;text-align:center}.official-follow img{display:block;width:148px;height:148px;object-fit:contain;padding:7px;border:1px solid #d9dde5;border-radius:var(--radius);background:#fff}.official-follow figcaption{margin-top:8px;line-height:1.45}.official-follow figcaption strong,.official-follow figcaption span{display:block}.official-follow figcaption strong{font-size:13px}.official-follow figcaption span{font-size:11px;color:var(--muted)}.learn-actions{display:flex;align-items:center;flex-wrap:wrap;gap:16px 28px;margin-top:28px}.learn-actions .button,.learn-actions .text-link{margin:0;white-space:nowrap}
@media(max-width:760px){.learn-panel-head{gap:16px}.official-follow{width:124px;flex-basis:124px}.official-follow img{width:124px;height:124px}.learn-panel-head h2{font-size:24px}.learn-actions{align-items:stretch;flex-direction:column;gap:12px;margin-top:24px}.learn-actions .button,.learn-actions .text-link{width:100%;justify-content:center}}
@media(max-width:390px){.learn-panel-head{display:block}.official-follow{width:152px;margin:0 0 22px}.official-follow img{width:152px;height:152px}.official-follow figcaption{text-align:left}}
.masthead{display:flex;align-items:center;justify-content:flex-start;gap:28px;max-width:none;width:100%;margin:0;padding:12px max(24px,calc((100vw - 1180px)/2));border-bottom:1px solid #e6e8ed}
.masthead .main-nav{display:flex;align-items:center;gap:28px;flex:1;margin:0;border:0;min-height:0}
.masthead .main-nav a{padding:8px 0;font-size:14px;white-space:nowrap;min-height:0}
.nav-mine{display:none}
.header-actions{display:flex;align-items:center;gap:16px;margin-left:auto;flex-shrink:0}
.header-actions a,.header-actions .button{white-space:nowrap}
.menu-toggle{display:none;border:1px solid #111;background:#fff;border-radius:var(--radius);padding:8px 12px;font-size:14px}
.masthead .main-nav a[aria-current="page"],.mobile-dock a[aria-current="page"]{box-shadow:inset 0 -2px 0 #000;font-weight:600}
.footer{display:grid;grid-template-columns:minmax(220px,1.1fr) minmax(0,2fr);gap:28px 40px;align-items:start}
.footer-cols{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px 28px}
.footer-cols strong{display:block;margin-bottom:8px;font-size:14px;font-weight:600}
.footer-cols a{display:block;padding:3px 0;font-size:14px}
.footer-reset{grid-column:1/-1;justify-self:start;background:none;border:0;padding:0;color:rgba(255,255,255,.7);font-size:12px}
.demo-foot{grid-column:1/-1}
.account-doors{display:flex;flex-wrap:wrap;gap:20px;margin:24px 0}
.account-doors a{border-bottom:1px solid #111;padding-bottom:3px}
.library-next{margin-top:28px}
@media(max-width:760px){.masthead{flex-wrap:wrap;gap:12px 12px;padding:12px 16px}.masthead .wordmark{flex:1;min-width:0;order:1}.header-actions{order:2;margin-left:0}.header-actions #identity-link{display:none}.header-actions a.button{display:inline-flex}.menu-toggle{display:inline-flex;order:3}.masthead .main-nav,.masthead .main-nav.expanded{display:none;flex:1 0 100%;width:100%;margin:0;order:4;flex-direction:column;align-items:stretch;justify-content:flex-start;gap:0;border-top:1px solid #e6e8ed}.masthead .main-nav.expanded{display:flex}.masthead .main-nav.expanded a,.masthead .main-nav.expanded a.nav-mine{display:flex;align-items:center;width:100%;min-height:44px;padding:12px 2px;font-size:16px;text-align:left}.footer{grid-template-columns:1fr}.footer-cols{grid-template-columns:1fr 1fr}}
.has-checkout-progress .mobile-dock{display:none}

.case-card{display:flex;flex-direction:column}
.case-card>.text-link{margin-top:auto}
@media(max-width:420px){.case-card{display:grid;grid-template-columns:100px 1fr;gap:0 16px}.case-card>.text-link{margin-top:0}}
.library-gate{display:flex;justify-content:space-between;align-items:center;gap:24px;margin:8px 0 28px;padding:28px 32px;background:#f4f5f8;border:1px solid #e4e7ee;border-radius:var(--radius)}
.library-gate h2{font-size:28px;margin:0 0 8px}
.library-gate p{margin:0;color:var(--muted);max-width:62ch}
.library-gate .button{flex:0 0 auto}
@media(max-width:760px){.library-gate{flex-direction:column;align-items:flex-start;padding:24px 20px}.library-gate .button{width:100%}}
.library-count{justify-content:space-between;margin-bottom:24px}
.library-more{display:flex;flex-direction:column;align-items:center;gap:12px;margin:36px 0 12px;padding-top:28px;border-top:1px solid var(--line)}
.library-more p{margin:0;color:var(--muted);font-size:14px}
@media(max-width:760px){.library-more .button{width:100%}}
.case-card.is-locked .case-cover-link{cursor:default}
.case-card.is-locked .case-cover-link:hover .case-art img{transform:none}
.case-locked-label{color:#5c6570;text-decoration:none;cursor:default;pointer-events:none}
@media(max-width:420px){.case-card>.case-locked-label{grid-column:2}}
.plan ol{font-size:14px;line-height:1.7;margin:0 0 24px;padding-left:1.2em;flex:1;color:#1c1c1c}
.plan ol li{margin:8px 0}

/* design-system */
:root{--radius:8px;--control:44px;--control-sm:36px;--container:1180px;--gutter:24px;--edge:max(var(--gutter),calc((100vw - var(--container))/2));--field-line:#c9ccd3}
@media(max-width:760px){:root{--gutter:20px}}
body{font-size:16px}
main{max-width:calc(var(--container) + var(--gutter)*2);padding-left:var(--gutter);padding-right:var(--gutter)}
.masthead,.footer{padding-left:var(--edge);padding-right:var(--edge)}
.button,button.primary,.button.secondary,button.secondary{min-height:var(--control);padding:0 20px;font-size:14px;font-weight:600;line-height:1.2;border-radius:var(--radius)}
.button.secondary,button.secondary{border-color:#111}
.button.compact,.menu-toggle,.chips a,.chips button,.list-row button,.slot button,td button{min-height:var(--control-sm);padding:0 16px;font-size:14px;border-radius:var(--radius)}
.chips a,.chips button{display:inline-flex;align-items:center;justify-content:center}
.menu-toggle{align-items:center;justify-content:center}
input:not([type=checkbox]):not([type=radio]),select{height:var(--control);min-height:0;padding:0 12px;line-height:normal;font-size:16px;border:1px solid var(--field-line);border-radius:var(--radius)}
textarea,.case-discussion textarea{padding:12px;font-size:16px;border:1px solid var(--field-line);border-radius:var(--radius)}
.tag{padding:4px 8px;font-size:12px;border-radius:var(--radius)}
.panel,.lock-box,.fact-box,.resource,.swipe-panel,.source,.banner,.case-discussion,.library-gate,.wecom-card{padding:24px}
@media(max-width:760px){.panel,.lock-box,.fact-box,.resource,.swipe-panel,.source,.banner,.case-discussion,.library-gate,.wecom-card{padding:20px}.masthead{padding:12px var(--gutter)}}
.case-card>.case-cover-link{margin-bottom:12px}.case-card>.meta{align-items:center}
.case-card .meta .buyer-mark,.case-card .meta .tag{display:inline-flex;align-items:center;height:24px;box-sizing:border-box;font-size:12px;border-radius:var(--radius)}
.case-card .meta .tag{padding:0 10px}
.case-card .meta .tag.member{background:transparent;color:#3c4450;box-shadow:inset 0 0 0 1px var(--field-line);gap:6px;padding:0 10px 0 8px}
.case-card .meta .tag.member svg{width:12px;height:12px;fill:none;stroke:currentColor;stroke-width:1.6}
.case-card .text-link.is-soft{color:#5b6472;text-decoration-color:#c9ccd3}
.case-card .text-link.is-soft:hover{color:#111;text-decoration-color:#111}
@media(max-width:420px){.case-card{display:flex;flex-direction:column}.case-card>.case-cover-link .case-art{height:auto;aspect-ratio:16/9}.case-card h3{font-size:20px;line-height:1.4}.case-card>.text-link{margin-top:auto}}
.resource-grid>.resource{display:flex;flex-direction:column}
.resource-grid>.resource>.text-link{margin-top:auto;align-self:flex-start}
.help-notes h3{font-family:var(--sans);font-size:16px;font-weight:700;line-height:1.5;margin:0 0 8px}
.help-notes .lede{font-size:14px;line-height:1.75;margin-top:0;max-width:none}
.pay-actions{display:flex;align-items:center;gap:24px;flex-wrap:wrap;margin-top:16px}
.footer-cols{row-gap:36px}
.footer-cols strong{padding-bottom:12px;margin-bottom:12px;border-bottom:1px solid rgba(255,255,255,.22)}

/* ===== 文末预约与讨论区版式 20261007 ===== */
.case-discussion{margin-top:36px}
.case-discussion .section-head{border-top:0;padding-top:0;margin:0 0 26px}
.case-discussion .section-head h2{margin:0}
#case-comments{margin-bottom:30px}
.case-discussion form label{display:block;font-size:14px;font-weight:700;margin-bottom:12px}
.case-discussion form textarea{margin:0 0 22px}
.case-discussion form .caption{margin:14px 0 0}
@media(max-width:650px){.case-discussion{margin-top:28px}#case-comments{margin-bottom:24px}.case-discussion form textarea{margin-bottom:18px}}
.forum-sync-link{display:inline-block;margin-top:14px;font-size:14px;font-weight:600;color:var(--wine)}

/* Member identity and durable account records. */
.login-methods{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin:28px 0 12px}
.login-methods .button,.login-methods button{width:100%;margin:0}
.auth-divider{display:flex;align-items:center;gap:14px;color:var(--muted);font-size:12px;margin:30px 0 22px}
.auth-divider:before,.auth-divider:after{content:"";height:1px;background:var(--line);flex:1}
.member-summary{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border:1px solid var(--line);background:var(--white);margin:24px 0}
.member-summary>div{padding:20px 24px;border-right:1px solid var(--line)}
.member-summary>div:last-child{border-right:0}
.member-summary span{display:block;color:var(--muted);font-size:12px;margin-bottom:6px}
.member-summary strong{display:block;font-size:18px;overflow-wrap:anywhere}
.member-order-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.member-order-card{border:1px solid var(--line);background:var(--white);padding:22px;min-width:0}
.member-order-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:14px}
.member-order-card dl{margin:0}
.member-order-card dl>div{display:grid;grid-template-columns:92px minmax(0,1fr);gap:16px;padding:10px 0;border-top:1px solid var(--line)}
.member-order-card dt{color:var(--muted);font-size:12px}
.member-order-card dd{margin:0;text-align:right;overflow-wrap:anywhere;font-size:14px}
@media(max-width:760px){
  .login-methods,.member-order-grid{grid-template-columns:1fr}
  .member-summary{grid-template-columns:1fr}
  .member-summary>div{border-right:0;border-bottom:1px solid var(--line)}
  .member-summary>div:last-child{border-bottom:0}
}

/* Mobile navigation background lock. */
@media(max-width:760px){
  body.nav-open{position:fixed;top:var(--nav-scroll-offset,0);left:0;right:0;width:100%;overflow:hidden}
  body.nav-open .masthead{position:relative;z-index:60;background:var(--paper)}
  body.nav-open .masthead .main-nav.expanded{max-height:calc(100vh - 96px);overflow-y:auto;overscroll-behavior:contain;-webkit-overflow-scrolling:touch}
}