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.author-grid .author-card{display:flex;align-items:flex-start;gap:25px;padding:26px;min-height:245px}.author-card>div{min-width:0;flex:1}.author-portrait{display:block;width:145px;height:185px;flex:none;object-fit:cover;object-position:center 24%;background:#e6eaf0;border:1px solid var(--line)}.author-card:nth-child(1) .author-portrait{object-position:center 28%}.author-card:nth-child(4) .author-portrait{object-position:center 18%}.author-card h2{margin:4px 0 3px}@media(max-width:650px){.author-grid .author-card{gap:17px;padding:19px;min-height:0}.author-portrait{width:104px;height:139px}.author-card h2{font-size:24px}.author-card>div>p:last-child{font-size:13px;line-height:1.8}}@media(max-width:390px){.author-grid .author-card{display:block}.author-portrait{width:130px;height:160px;margin-bottom:12px}}
.practice-teaser{background:#e9f0f5;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.practice-teaser-inner{display:flex;align-items:end;justify-content:space-between;gap:45px}.practice-teaser h2,.exercise-heading h2{font-family:"Songti SC","STSong",serif;color:var(--navy);font-size:clamp(29px,3vw,42px);line-height:1.35;margin:10px 0 15px}.practice-teaser p,.exercise-heading p{max-width:650px;color:#506377;font-size:15px;line-height:1.9;margin:0}.practice-teaser .button{flex:none}.exercise-heading{display:flex;align-items:end;justify-content:space-between;gap:40px;margin-bottom:28px}.exercise-heading p{max-width:400px;font-size:14px}.exercise-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:17px}.exercise-card{background:#fff;border:1px solid var(--line);padding:29px;scroll-margin-top:22px;box-shadow:0 8px 23px rgba(17,43,77,.035)}.exercise-card-head{display:flex;align-items:center;justify-content:space-between;gap:10px;color:var(--gold-dark);font-size:12px;font-weight:750;letter-spacing:.03em}.exercise-card-head a{color:#527092;font-size:11px;font-weight:600;white-space:nowrap}.exercise-card h3{font-size:21px;color:var(--navy);margin:11px 0 13px}.exercise-question{font-size:14px;line-height:1.9;margin:0 0 20px}.exercise-card details{border-top:1px solid var(--line);padding-top:14px}.exercise-card summary{color:var(--navy);font-size:13px;font-weight:750;cursor:pointer;list-style:none}.exercise-card summary::-webkit-details-marker{display:none}.exercise-card summary:after{content:'＋';float:right;color:var(--gold-dark);font-size:17px;line-height:1}.exercise-card details[open] summary:after{content:'－'}.exercise-card ol{padding-left:19px;margin:16px 0 0;color:#506377;font-size:13px;line-height:1.9}.exercise-card ol li+li{margin-top:7px}.exercise-end{margin:25px 0 0;color:var(--muted);font-size:12px}.chapter-exercise-note .text-link{font-size:12px}@media(max-width:850px){.exercise-list{grid-template-columns:1fr}}@media(max-width:650px){.practice-teaser-inner,.exercise-heading{display:block}.practice-teaser .button{margin-top:26px}.exercise-card{padding:23px}.exercise-card h3{font-size:19px}.exercise-heading p{margin-top:12px}}
.video-options{display:flex;gap:7px;flex-wrap:wrap;margin:14px 0}.video-options button{background:#f4f7fa;border:1px solid #bdcbd8;border-radius:3px;padding:7px 11px;color:var(--navy);font-size:12px;font-weight:700}.video-options button.selected{background:var(--navy);color:#fff;border-color:var(--navy)}.video-player{width:100%;aspect-ratio:16/9;background:#e8edf2}.video-player iframe{display:block;width:100%;height:100%;border:0}.video-external{display:inline-block;margin-top:11px;font-size:12px;color:var(--navy);font-weight:750}.video-external:hover{text-decoration:underline}


.author-card{align-items:center;min-height:0}

.video-platform-section{background:#e9f0f5;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.video-platform-inner{display:grid;grid-template-columns:minmax(250px,.8fr) minmax(0,1.2fr);gap:60px;align-items:center}.video-platform-inner h2{font-family:"Songti SC","STSong",serif;color:var(--navy);font-size:clamp(30px,3vw,42px);line-height:1.3;margin:12px 0}.video-platform-inner p{margin:0;color:#506377}.video-platform-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.video-platform-links a{display:flex;flex-direction:column;justify-content:space-between;min-height:135px;padding:24px;background:#fff;border:1px solid var(--line);box-shadow:0 8px 23px rgba(17,43,77,.035)}.video-platform-links a:hover{border-color:var(--gold);transform:translateY(-2px)}.video-platform-links strong{color:var(--navy);font-size:21px}.video-platform-links span{color:var(--gold-dark);font-size:12px;font-weight:700}@media(max-width:850px){.video-platform-inner{grid-template-columns:1fr;gap:28px}}@media(max-width:650px){.video-platform-links{grid-template-columns:1fr}.video-platform-links a{min-height:104px}}

/* Video course */
.course-video-section{background:#fff}.course-video-layout{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(270px,.75fr);gap:52px;align-items:start}.course-video-main h2,.course-video-aside h2{font-family:"Songti SC","STSong",serif;color:var(--navy);line-height:1.4;margin:13px 0}.course-video-main h2{font-size:clamp(27px,3vw,37px)}.course-video-main>p{color:#506377;font-size:14px;line-height:1.9;margin:0 0 21px}.course-video-main .video-options{margin:0 0 13px}.course-video-main .video-player{border:1px solid #cfdce8;box-shadow:0 16px 36px rgba(17,43,77,.12)}.course-video-links{display:flex;flex-wrap:wrap;gap:25px;margin:22px 0 8px}.course-video-links .text-link{margin:0}.course-video-main .video-region-note{font-size:12px;color:#708196;margin-top:24px}.course-video-aside{background:#f2f6f9;border:1px solid var(--line);padding:24px}.course-video-aside h2{font-size:25px;margin-bottom:18px}.video-chapter-list{display:grid;gap:5px;max-height:660px;overflow-y:auto;scrollbar-color:#a7b8c9 transparent}.video-chapter-item{display:flex;align-items:center;gap:13px;width:100%;min-height:59px;padding:11px 12px;background:#fff;border:1px solid transparent;color:var(--ink);text-align:left}.video-chapter-item:hover,.video-chapter-item.active{border-color:#b8c9d9;background:#e6eff6}.video-chapter-item.active{box-shadow:inset 3px 0 0 var(--gold)}.video-chapter-number{font:22px Georgia,serif;color:var(--gold-dark);min-width:31px}.video-chapter-name{font-size:13px;font-weight:650;line-height:1.45;flex:1}.video-chapter-arrow{color:#66809a}@media(max-width:950px){.course-video-layout{grid-template-columns:1fr;gap:35px}.video-chapter-list{grid-template-columns:repeat(2,minmax(0,1fr));max-height:none}.course-video-aside{padding:20px}}@media(max-width:600px){.video-chapter-list{grid-template-columns:1fr}.course-video-section{padding:58px 0}.course-video-main h2{font-size:26px}.course-video-aside{padding:18px}}
.videos-hero{padding:60px 0 62px}.videos-hero h1{font-size:clamp(36px,4vw,52px);margin:12px 0}.videos-hero p{margin:0}.course-video-section{padding:68px 0}

/* The author portraits and biographies are presented as four full-width rows. */
.author-grid{grid-template-columns:1fr;gap:18px}.author-grid .author-card{align-items:center;min-height:220px;gap:34px;padding:27px 32px}.author-card .author-portrait{width:160px;height:190px}.author-card h2{margin:5px 0 11px}.author-card .author-bio{max-width:850px;margin:0;color:#435469;font-size:16px;line-height:2}.author-card>div>p:last-child{margin:0;font-size:16px;line-height:2}@media(max-width:650px){.author-grid .author-card{min-height:0;gap:18px;padding:20px}.author-card .author-portrait{width:110px;height:145px}.author-card .author-bio,.author-card>div>p:last-child{font-size:13px;line-height:1.85}}@media(max-width:390px){.author-grid .author-card{display:flex;align-items:flex-start}.author-card .author-portrait{width:90px;height:116px;margin:0}.author-card h2{font-size:22px}}
.author-grid .author-card{align-items:flex-start}

/* Fintech Panorama entry page: the existing textbook and video course share one home. */


.panorama-hero,.panorama-hero .hero-inner{min-height:565px}
.panorama-hero .hero-content{max-width:790px}
.panorama-hero h1{font-size:clamp(42px,5vw,68px)}
.panorama-sections{padding:82px 0 100px}
.panorama-sections h2{font-family:"Songti SC","STSong",serif;color:var(--navy);font-size:clamp(30px,3.2vw,44px);margin:12px 0 30px}
.panorama-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:25px}
.panorama-card{position:relative;display:block;overflow:hidden;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);transition:transform .2s,box-shadow .2s}
.panorama-card:hover{transform:translateY(-4px);box-shadow:0 24px 50px rgba(17,43,77,.16)}
.panorama-card-number{position:absolute;z-index:1;left:22px;top:18px;padding:5px 10px;background:var(--navy);color:#fff;font:700 11px Georgia,"Times New Roman",serif;letter-spacing:.12em}
.panorama-card img{display:block;width:100%;height:240px;object-fit:cover;background:#e9f0f5}
.panorama-card>div{padding:25px 28px 30px}
.panorama-card h3{font-family:"Songti SC","STSong",serif;font-size:26px;color:var(--navy);margin:0 0 8px}
.panorama-card p{color:#53657b;font-size:15px;line-height:1.8;margin:0 0 21px}
.panorama-card .text-link{display:inline-block;color:var(--gold-dark);font-weight:700}
@media(max-width:720px){.panorama-hero,.panorama-hero .hero-inner{min-height:530px}.panorama-grid{grid-template-columns:1fr}.panorama-card img{height:210px}.panorama-sections{padding:60px 0}}


/* Site-wide refinement: one Fintech Panorama header and footer, a book sub-navigation, and shared card styling. */
:root{--radius:6px;--sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif}
h1,h2,h3{text-wrap:balance;text-spacing-trim:trim-start}
:focus-visible{outline:2px solid var(--gold);outline-offset:3px}
::selection{background:#f3e3c2;color:var(--navy-deep)}

.site-header{height:72px}
.brand{font-family:Georgia,"Times New Roman",serif;font-size:22px;letter-spacing:0}
.brand small{font:600 10px/1.3 var(--sans);letter-spacing:.14em;color:#6a7f99;margin-top:2px}
.site-header nav{gap:34px}
.site-header nav a{font-size:15px;padding:24px 0 21px;white-space:nowrap}
.header-cta,.button{border-radius:var(--radius)}
.header-cta{transition:background .2s}

.section-nav{background:#fff;border-bottom:1px solid var(--line)}
.section-nav-inner{display:flex;align-items:center;gap:28px;min-height:54px}
.section-nav-title{font-family:"Songti SC","STSong",serif;font-size:16px;font-weight:700;color:var(--navy);white-space:nowrap;padding-left:13px;border-left:3px solid var(--gold);line-height:1.2}
.section-nav-links{display:flex;gap:6px;margin-left:auto}
.section-nav-links a{padding:6px 15px;border-radius:999px;font-size:14px;color:#56687c;white-space:nowrap;transition:background .2s,color .2s}
.section-nav-links a:hover{color:var(--navy);background:var(--blue-pale)}
.section-nav-links a.active{background:var(--navy);color:#fff}

.chapter-card,.resource-card,.exercise-card,.author-grid article,.panorama-card,.detail-resource,.video-note,.course-video-aside,.video-platform-links a{border-radius:var(--radius)}
.detail-resource{overflow:hidden}
.video-chapter-item,.video-options button,.filter-bar input,.book-isbn,.author-names span{border-radius:4px}
.author-portrait{border-radius:4px}
.course-video-main .video-player{border-radius:var(--radius);overflow:hidden}
.chapter-card{position:relative;overflow:hidden}
.chapter-card:before{content:"";position:absolute;left:0;top:0;width:0;height:3px;background:var(--gold);transition:width .3s}
.chapter-card:hover:before{width:100%}
.chapter-card p{font-size:14px;line-height:1.8}
.video-platform-links a{transition:border-color .2s,transform .2s}

.panorama-card{display:flex;flex-direction:column}
.panorama-card img{height:auto;aspect-ratio:16/9;transition:transform .5s}
.panorama-card:hover img{transform:scale(1.03)}
.panorama-card>div{position:relative;flex:1;display:flex;flex-direction:column;align-items:flex-start;padding:26px 30px 30px;background:#fff}
.panorama-card-number{position:static;padding:0;margin:0 0 12px;background:none;color:var(--gold-dark);font:700 11px/1.4 Georgia,"Times New Roman",serif;letter-spacing:.16em}
.panorama-card .text-link{margin-top:auto}

.site-footer{padding-top:56px}
.footer-grid{align-items:flex-start}
.footer-brand{font-family:Georgia,"Times New Roman",serif;font-size:22px}
.footer-brand small{font:600 10px/1.6 var(--sans);letter-spacing:.14em;margin-top:4px}
.site-footer nav{flex-wrap:wrap;gap:12px 28px}
.site-footer nav a{color:#c9d6e4;transition:color .2s}
.footer-bottom{margin-top:40px}

@media(max-width:650px){
.site-header{height:auto}
.header-inner{height:62px;gap:12px}
.brand{font-size:17px;gap:10px}
.brand small{font-size:9px;letter-spacing:.1em}
.brand-mark{width:26px;height:26px}
.site-header nav{gap:18px}
.site-header nav a{font-size:14px;padding:20px 0 17px}
.section-nav-inner{min-height:50px}
.section-nav-title{display:none}
.section-nav-links{margin:0 -17px;padding:7px 17px;gap:4px;overflow-x:auto;scrollbar-width:none}
.section-nav-links::-webkit-scrollbar{display:none}
.section-nav-links a{padding:8px 13px}
.hero p{font-size:15px;line-height:1.9}
.section-lead,.authors-teaser p{font-size:15px}
.page-hero h1{font-size:32px}
.button{min-height:44px}
.video-options button{min-height:40px;padding:8px 14px}
.panorama-card>div{padding:22px 22px 26px}
.site-footer{padding-top:44px}
.site-footer nav{margin-top:22px;gap:10px 22px}
.footer-bottom{flex-direction:column;gap:4px;margin-top:30px}
}
@media(max-width:480px){
.page-hero h1{font-size:30px}
.header-inner{height:auto;flex-wrap:wrap;row-gap:0;padding-top:11px}
.site-header nav{width:100%;margin-left:0;gap:26px}
.site-header nav a{padding:10px 0 11px}
}
@media(prefers-reduced-motion:reduce){.panorama-card:hover img{transform:none}}

/* Missing pages retain the site navigation and return a real HTTP 404. */
.not-found-page { min-height: 55vh; display: grid; align-items: center; }
.not-found-page h1 { font-size: clamp(2rem, 5vw, 3.5rem); line-height: 1.25; margin: 1rem 0; }
.not-found-page p { max-width: 42rem; color: var(--muted, #5d6878); line-height: 1.9; }
.not-found-page .hero-actions { flex-wrap: wrap; margin-top: 2rem; }

/* Editorial artwork, shared textbook palette. */
.hero-art{background-image:linear-gradient(90deg,rgba(11,29,55,.82) 0%,rgba(11,29,55,.48) 38%,rgba(11,29,55,0) 67%),url('/assets/fintech-hero-editorial.webp');background-position:center;background-size:cover}.hero:before{display:none}.brand small{letter-spacing:.08em}
@media(max-width:700px){.hero-art{background-position:center,right center;background-image:linear-gradient(90deg,rgba(11,29,55,.93),rgba(11,29,55,.58)),url('/assets/fintech-hero-editorial.webp')}}