/* V2 editorial theme. V1 stylesheet and learning logic remain reusable. */
:root{--ink:#25382f;--muted:#736f62;--green:#203e31;--paper:#f5f2e9;--line:#dddace;--gold:#b39b69;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}body{background:var(--paper);color:var(--ink)}.site-header,main,footer{max-width:1440px;padding-left:48px;padding-right:48px}.site-header{height:80px;border-bottom:1px solid #d5d1c3;gap:20px}.brand{font-size:17px;letter-spacing:1px;gap:12px}.brand-mark{width:37px;height:39px;border-radius:3px;font-family:Georgia,serif;font-size:28px;font-weight:400}.brand b{font-weight:550}.header-links{display:flex;align-items:center;gap:30px;margin-left:auto;margin-right:24px;font-size:12px;letter-spacing:1px}.header-links a{text-decoration:none;color:#5c6559;padding:12px 0}.header-links a:hover{color:#a08245}.version{padding:7px 11px;border:1px solid #d5cfbd;border-radius:2px;font-size:10px;letter-spacing:1px;background:#f7f5ed}.version i{background:var(--gold)}.hero{grid-template-columns:1fr 1.05fr;gap:50px;padding:30px 0 29px;align-items:center}.eyebrow{font-size:10px;letter-spacing:3px;color:#897746}.eyebrow>span{height:5px;width:5px;background:#ac915a;border-radius:0}h1{font-family:"Iowan Old Style","Songti SC","STSong",Georgia,"SimSun",serif;font-size:46px;line-height:1.24;font-weight:500;letter-spacing:1px;margin:16px 0 13px}h1>span{color:#778461}.intro{font-size:12px;line-height:1.9;color:#737364}.start-link{padding:11px 17px;min-height:44px;border-radius:3px;font-size:12px;font-weight:500;margin-top:18px;gap:30px;letter-spacing:1px}.start-link span{font-size:20px}.hero-facts{display:flex;gap:23px;margin-top:20px;font-size:10px;color:#777d6b;align-items:baseline}.hero-facts b{font-family:Georgia,serif;font-weight:400;font-size:17px;color:#465342;margin-right:4px}.hero-facts>span+span{border-left:1px solid #d5d2c4;padding-left:19px}.hero-photo{margin:0;position:relative;overflow:hidden;height:302px;border-radius:3px}.hero-photo>img{width:100%;height:100%;object-fit:cover;object-position:center 56%;display:block}.hero-photo::after{content:"";position:absolute;inset:50% 0 0;background:linear-gradient(transparent,#1c281c85);pointer-events:none}.hero-photo figcaption{position:absolute;left:24px;right:24px;bottom:20px;z-index:1;color:#fff8e9;display:flex;justify-content:space-between;align-items:center;gap:15px}.hero-photo figcaption span:first-child{font-family:"Songti SC","SimSun",serif;font-size:18px;letter-spacing:2px}.hero-photo figcaption span:last-child{font-size:9px;letter-spacing:1.5px}.progress-panel{margin:0 0 30px;padding:18px 25px;background:#203e31;border:0;border-radius:3px;gap:35px;color:#f2efe1}.progress-copy{display:flex;align-items:center;gap:24px;flex-wrap:wrap}.progress-copy .section-kicker{display:none}.progress-copy h2{font-size:14px;font-weight:500;margin:0;letter-spacing:1px;white-space:nowrap}.progress-copy p{margin:0;font-size:11px;color:#bbc6b3}.progress-display{width:39%;max-width:430px}.progress-display>div{margin-bottom:7px}.progress-display strong{font-family:Georgia,serif;font-weight:400;font-size:22px;color:#fff7e1}.progress-display small{font-family:inherit;font-size:10px;color:#c3ceb9}.progress-display>div>span{color:#c8b27d;font-size:10px}progress{height:4px;background:#3c5745}progress::-webkit-progress-bar{background:#3c5745}progress::-webkit-progress-value{background:#c3ac75}progress::-moz-progress-bar{background:#c3ac75}#storage-status{font-size:9px;color:#aabd9f;line-height:1.5;margin-top:7px}#storage-status.storage-warning{color:#ffdc9f}.section-kicker{font-size:9px;letter-spacing:2px;color:#8d7d54}h2{font-family:"Iowan Old Style","Songti SC","SimSun",serif;font-weight:500;letter-spacing:.7px;font-size:26px;margin-top:6px}.category-badge{color:#7e775f;background:transparent;border:1px solid #d8d1bc;border-radius:2px;font-size:10px;padding:8px 10px}.category-badge span{border-color:#d8d1bc}.section-description{font-size:11px;margin:9px 0 0;color:#777965}.sample-note{display:flex;align-items:center;gap:7px;font-size:10px;color:#8e805e;margin:14px 0 18px;line-height:1.7}.sample-note>span{width:4px;height:4px;background:#b19a60;flex-shrink:0}.study-tools{margin-bottom:0}.tools-top{gap:20px}.category-tabs{gap:5px}.category-tabs button{font-size:11px;letter-spacing:.5px;border-radius:3px;padding:10px 14px;min-height:44px;color:#69705d}.category-tabs button[aria-pressed=true]{background:#203e31;color:#fff9e8}.category-tabs span{font-size:9px;margin-left:6px}.search-box{border-radius:3px;width:285px;border-color:#d7d2c1;background:#fcfbf5}.search-box input{font-size:12px}.tools-bottom{margin-top:12px;padding-top:10px;gap:15px}.toggle-options{gap:23px}.toggle-options label{font-size:11px;color:#65715e;min-height:44px}.toggle-options input{width:15px;height:15px}.shuffle-button,.plain-button{border-radius:3px;font-size:11px;min-height:44px}.shuffle-button{background:#ece9dc;border-color:#d7cfb9;color:#566044}.shuffle-button:hover{background:#e1dcc9}.plain-button{color:#79785e}.results-heading{font-size:10px;margin:7px 0 14px;color:#7d806e}.results-heading a{color:#6c745f}.cards{gap:24px;align-items:stretch}.card{border:1px solid #dfdacb;border-radius:4px;background:#fffdf6;box-shadow:none;transition:transform .2s,border-color .2s,box-shadow .2s}.card:hover{box-shadow:0 9px 26px #413e2510;transform:translateY(-3px);border-color:#c6b998}.image-wrap{aspect-ratio:3/2;background:#ece9de;overflow:hidden}.image-wrap img{width:100%;height:100%;object-fit:contain}.image-wrap.photographic img{object-fit:cover}.card-number{left:16px;top:15px;background:#fffdf0e8;border:0;border-radius:2px;width:26px;height:25px;font-family:Georgia,serif;font-size:11px;color:#56604b}.media-label{position:absolute;right:12px;bottom:11px;font-size:8px;letter-spacing:.5px;padding:5px 7px;background:#fbf7eae6;color:#5a6350;border-radius:2px}.card-content{padding:21px 22px 12px}.card-chapter{font-size:9px;letter-spacing:2px;color:#9b8655;margin:0 0 10px}.word-line{font-family:"Iowan Old Style","Palatino Linotype",Georgia,serif;font-size:30px;font-weight:500;line-height:1.18;letter-spacing:-.5px}.pos{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:11px;color:#89907d;margin-left:7px}.meaning{font-size:13px;color:#777b65;line-height:1.6;margin:10px 0 20px;min-height:21px}.meaning.hidden-meaning{font-size:12px;color:#8d8d7b;letter-spacing:1px}.sound-button{min-height:46px;border-radius:3px;background:#203e31;color:#fff9e9;border:1px solid #203e31;font-size:11px;font-weight:500;letter-spacing:.4px;gap:9px}.sound-button:hover{background:#335741}.sound-button[aria-busy=true]{background:#bb9d62;border-color:#bb9d62;color:#182e22}.sound-button svg{width:17px;height:17px}.mastery-button{min-height:44px;margin-top:6px;border-radius:2px;font-size:10px;color:#7e856f}.mastery-button[aria-pressed=true]{color:#3f6540;background:#edf0e3}.mastery-icon{width:15px;height:15px;font-size:9px}.card.is-mastered{border-color:#839776}.audio-status{font-size:10px;margin-top:15px;color:#7a806b}.empty-state{border-color:#c9c2ac;border-radius:4px;background:#eeeadd}.empty-state h3{font-family:"Songti SC",serif}.preview-notice{margin:24px 0 25px;background:#eeeadd;border-color:#e0d8c6;border-radius:3px;padding:17px 20px}.preview-notice strong{font-size:11px;color:#667056}.preview-notice p{font-size:10px;color:#81816d}.notice-icon{width:19px;height:19px;font-size:12px}footer{font-size:10px;padding-top:19px;padding-bottom:24px;color:#8c8875}footer>span{color:#59664e;font-weight:500;letter-spacing:1px}.skip-link{top:-100px}.skip-link:focus{top:10px;background:#fffdf6}
@media(min-width:1441px){.hero{padding-top:32px;padding-bottom:32px}}
@media(min-width:701px) and (max-width:1100px){.site-header,main,footer{padding-left:30px;padding-right:30px}.hero{gap:30px;grid-template-columns:1fr 1fr}.hero-photo{height:290px}h1{font-size:39px}.hero-facts{gap:11px;font-size:9px}.hero-facts>span+span{padding-left:11px}.hero-facts b{font-size:15px}.hero-photo figcaption{left:16px;right:16px}.hero-photo figcaption span:first-child{font-size:14px}.hero-photo figcaption span:last-child{font-size:8px}.progress-copy{gap:8px;flex-direction:column;align-items:flex-start}.cards{gap:18px}.card-content{padding:19px 18px 10px}.word-line{font-size:27px}.search-box{width:245px}.category-tabs button{padding:10px;font-size:10px}.category-tabs span{margin-left:4px}.header-links{margin-right:10px}}
@media(min-width:701px) and (max-width:900px){.cards{grid-template-columns:repeat(2,minmax(0,1fr))}.tools-top{align-items:stretch;flex-direction:column;gap:12px}.search-box{width:100%}.category-tabs button{font-size:12px}.hero-photo{height:280px}.hero-facts span:last-child{display:none}.header-links{gap:18px}}
@media(max-width:700px){.site-header,main,footer{padding-left:20px;padding-right:20px}.site-header{height:69px;gap:10px}.brand{font-size:14px;letter-spacing:.5px;gap:9px}.brand-mark{width:31px;height:34px;font-size:25px}.version{font-size:8px;letter-spacing:.4px;padding:7px 8px}.header-links{display:none}.hero{display:grid;grid-template-columns:1fr;gap:20px;padding:25px 0 23px}.eyebrow{font-size:9px;letter-spacing:2px}h1{font-size:37px;line-height:1.2;margin:13px 0 11px;letter-spacing:.5px}.intro{font-size:11px;line-height:1.85}.start-link{margin-top:13px;padding:10px 14px;font-size:11px;gap:20px;min-height:44px}.hero-facts{margin-top:14px;gap:16px;font-size:9px}.hero-facts>span+span{padding-left:14px}.hero-facts b{font-size:15px}.hero-photo{height:auto;aspect-ratio:1.8;border-radius:3px}.hero-photo figcaption{left:16px;right:16px;bottom:15px}.hero-photo figcaption span:first-child{font-size:15px}.hero-photo figcaption span:last-child{font-size:8px}.progress-panel{padding:17px 19px;margin-bottom:25px;flex-direction:row;gap:13px;align-items:center}.progress-copy{display:flex;flex-direction:column;align-items:flex-start;gap:7px}.progress-copy h2{font-family:-apple-system,"PingFang SC",sans-serif;font-size:12px;font-weight:500;letter-spacing:0}.progress-copy p{font-size:9px;line-height:1.7;max-width:128px}.progress-display{width:48%;min-width:135px}.progress-display strong{font-size:21px}.progress-display small{font-size:9px}.progress-display>div>span{font-size:9px}#storage-status{font-size:8px}.section-heading h2,.progress-panel+.vocabulary-section .section-heading h2{font-size:24px}.section-kicker{font-size:8px}.category-badge{font-size:9px;padding:7px}.section-description{font-size:10px;margin-top:8px;line-height:1.8}.sample-note{font-size:9px;margin:11px 0 14px;align-items:baseline}.category-tabs{gap:3px;justify-content:space-between}.category-tabs button{padding:8px 7px;font-size:11px;flex:1;white-space:nowrap;min-height:44px;letter-spacing:0}.category-tabs span{font-size:8px;margin-left:3px}.tools-top{gap:11px}.search-box{width:100%;min-height:46px}.search-box input{font-size:16px}.tools-bottom{margin-top:10px;padding-top:9px;flex-direction:row;align-items:center;flex-wrap:wrap;gap:5px}.toggle-options{gap:13px;justify-content:flex-start}.toggle-options label{font-size:10px;gap:4px;min-height:44px}.toggle-options input{width:15px;height:15px}.random-tools{gap:5px;margin-left:auto}.shuffle-button,.plain-button{padding:8px 10px;font-size:10px}.shuffle-button span{font-size:16px;margin-right:3px}.results-heading{font-size:9px;margin:6px 0 13px}.cards{grid-template-columns:1fr;gap:23px}.card-content{padding:21px 22px 12px}.word-line{font-size:33px}.pos{font-size:11px}.meaning{font-size:14px;margin-bottom:19px}.card-chapter{font-size:9px}.sound-button{font-size:12px;min-height:48px}.mastery-button{font-size:11px;min-height:45px}.audio-status{font-size:10px}.preview-notice{padding:16px;gap:10px}.preview-notice p{font-size:10px}footer{font-size:9px;gap:11px}}
@media(max-width:360px){.site-header,main,footer{padding-left:15px;padding-right:15px}.version{font-size:7px}h1{font-size:33px}.category-tabs button{font-size:10px;padding:8px 5px}.progress-panel{padding:16px 13px}.progress-copy p{font-size:8px}.hero-facts{gap:11px}.hero-facts>span+span{padding-left:10px}}
/* 保持教学界面的可读性：核心操作字号不因编辑式排版而缩小。 */
.intro{font-size:13px}.header-links{font-size:13px}.start-link{font-size:13px}.section-description{font-size:13px}.sample-note{font-size:11px;color:#76623d}.category-tabs button{font-size:12px}.category-tabs span{font-size:10px}.toggle-options label{font-size:12px}.shuffle-button,.plain-button{font-size:12px}.results-heading{font-size:11px}.card-chapter{font-size:11px;color:#7d683d}.word-line{font-size:32px}.pos{font-size:12px;color:#6f7865}.meaning{font-size:15px;color:#656d56}.sound-button{font-size:13px}.mastery-button{font-size:12px;color:#68725d}.media-label{font-size:10px}.audio-status{font-size:11px}.preview-notice strong{font-size:12px}.preview-notice p{font-size:11px}.hero-facts{font-size:11px;color:#656d56}.progress-copy p{font-size:12px}.progress-copy h2{font-size:15px}#storage-status{font-size:10px}.progress-display small{font-size:11px}.progress-display>div>span{font-size:11px}.search-box input{font-size:13px}.category-badge{font-size:11px}.version{font-size:11px}.section-kicker{font-size:10px}.hero-photo figcaption span:last-child{font-size:11px}footer{font-size:11px}
@media(min-width:701px) and (max-width:1100px){.hero-facts{font-size:10px}.category-tabs button{font-size:11px}.word-line{font-size:29px}.hero-photo figcaption span:last-child{font-size:9px}}
@media(max-width:700px){.intro{font-size:12px}.start-link{font-size:12px}.hero-facts{font-size:10px}.version{font-size:9px}.section-description{font-size:12px}.sample-note{font-size:10px}.category-tabs button{font-size:11px}.category-tabs span{font-size:9px}.search-box input{font-size:16px}.toggle-options label,.shuffle-button,.plain-button{font-size:12px}.random-tools{margin-top:2px}.word-line{font-size:34px}.meaning{font-size:16px}.sound-button{font-size:14px}.mastery-button{font-size:13px}.card-chapter{font-size:11px}.media-label{font-size:10px}.progress-copy h2{font-size:13px}.progress-copy p{font-size:10px}.progress-display small{font-size:10px}#storage-status{font-size:9px}.hero-photo figcaption span:last-child{font-size:9px}.category-badge{font-size:10px}.results-heading{font-size:10px}}
@media(max-width:360px){.version{font-size:8px}.category-tabs button{font-size:10px}.category-tabs span{font-size:8px}.hero-facts{font-size:9px}.progress-copy p{font-size:9px}}

/* 第二轮：紧凑的视觉词典，去除卡片旁白，强化图片和核心操作。 */
.site-header{height:72px}.hero{grid-template-columns:1fr 1.25fr;gap:32px;padding:24px 0}.hero-photo{height:240px}.hero-photo::after{display:none}h1{font-size:52px;line-height:1.12;letter-spacing:1px;margin:14px 0}.eyebrow{font-size:11px}.intro{font-size:14px}.start-link{margin-top:14px}.progress-panel{margin-bottom:25px;padding:15px 22px}.section-heading{margin-top:0}.section-heading h2{font-size:29px}.sample-note{margin:10px 0 16px}.study-tools{padding:16px 20px;background:#eeebdf;border:1px solid #ddd7c5;border-radius:6px}.category-tabs button{font-size:13px}.search-box{background:#fffdf6}.tools-bottom{border-color:#d7d0be}.cards{gap:28px 24px}.card{border-radius:6px;overflow:hidden;border-color:#d7d0bd}.card-content{padding:20px 22px 12px}.word-line{font-size:34px}.meaning{margin:8px 0 18px}.media-label{font-size:9px;padding:4px 6px;opacity:.8}.card-number{background:#203e31;color:#fff9e9}.results-heading{margin:15px 0}.sound-button{font-size:14px}.mastery-button{font-size:13px}footer{margin-top:28px}.vocabulary-section{scroll-margin-top:20px}
@media(min-width:701px) and (max-width:1100px){h1{font-size:44px}.hero-photo{height:230px}.word-line{font-size:29px}.study-tools{padding:14px}.category-tabs button{font-size:12px}}
@media(max-width:700px){.site-header{height:64px}.hero{grid-template-columns:1fr .9fr;gap:14px;padding:22px 0}.hero-photo{height:184px;aspect-ratio:auto}.hero-photo img{object-position:center}.eyebrow{font-size:8px;letter-spacing:1px}h1{font-size:30px;margin:12px 0;line-height:1.2;letter-spacing:0}.intro{font-size:11px;line-height:1.8}.start-link{font-size:11px;gap:9px;margin-top:10px;padding:9px 10px}.progress-panel{padding:14px 16px;margin-bottom:22px}.study-tools{padding:12px}.category-tabs{flex-wrap:wrap}.category-tabs button{font-size:11px}.tools-bottom{gap:6px}.toggle-options{gap:12px;flex-wrap:wrap}.random-tools{margin-left:0}.cards{gap:22px}.card-content{padding:20px 22px 12px}.word-line{font-size:34px}.meaning{font-size:16px}.section-heading h2{font-size:26px}}
@media(max-width:360px){h1{font-size:26px}.hero{gap:10px}.hero-photo{height:178px}.intro{font-size:10px}.study-tools{padding:10px}.toggle-options{gap:8px}.toggle-options label{font-size:11px}}

/* 卡片答案开关：保留排版尺寸，44px 触控区。 */
.answer-row{display:flex;align-items:center;gap:8px;justify-content:space-between}.answer-text{min-width:0;overflow-wrap:anywhere}.answer-concealed{visibility:hidden}.answer-row:has(.answer-concealed){background:linear-gradient(#e8e4d8,#e8e4d8) left center/90px 12px no-repeat}.eye-button{flex:0 0 44px;width:44px;height:44px;padding:12px;border:0;background:transparent;color:#6a7867;border-radius:50%;cursor:pointer;display:inline-flex;align-items:center;justify-content:center}.eye-button svg{width:20px;height:20px}.eye-button:hover{background:#e9ede3}.eye-button:focus-visible{outline:2px solid #203e31;outline-offset:2px}.meaning.answer-row{margin:4px 0 14px;min-height:44px}.learning-steps{display:flex;flex-wrap:wrap;gap:12px 18px;padding:0;margin:16px 0;list-style:none;font-size:12px;color:#68725d}.learning-steps b{font-family:Georgia,serif;font-weight:400;color:#927c49;font-size:16px;margin-right:4px}@media(max-width:700px){.learning-steps{gap:5px;flex-direction:column;font-size:11px;margin:10px 0}.learning-steps b{font-size:14px}}

/* B 居中封面 + A 横向学习步骤：延续纸色、森林绿与编辑式字排。 */
.hero.editorial-cover{display:block;text-align:center;padding:42px 20px 32px;background:radial-gradient(ellipse at 50% 10%,#fffdf580,transparent 72%)}.editorial-cover .hero-copy{max-width:1040px;margin:0 auto}.editorial-cover .eyebrow{justify-content:center;font-size:11px;letter-spacing:3px;color:#897746}.editorial-cover h1{font-size:clamp(36px,4.4vw,60px);font-weight:500;letter-spacing:2px;line-height:1.3;margin:18px 0 13px;text-wrap:balance}.editorial-cover h1 span{color:#526a50;white-space:nowrap}.editorial-cover .intro{font-size:14px;line-height:1.8;letter-spacing:.6px;margin:0;color:#727568}.editorial-cover .start-link{margin-top:22px;min-height:48px;padding:12px 24px;gap:24px;font-size:14px;letter-spacing:1px}.cover-steps.learning-steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;max-width:850px;margin:0 auto 26px;padding:18px 0;border-top:1px solid #d9d3c0;border-bottom:1px solid #d9d3c0;font-size:13px;letter-spacing:.5px}.cover-steps li{display:flex;align-items:center;justify-content:center;gap:12px;min-width:0;min-height:28px}.cover-steps li+li{border-left:1px solid #ddd7c5}.step-symbol{display:inline-flex;align-items:center;gap:12px}.cover-steps b{font-size:20px;margin:0;color:#a18a56;line-height:1}.step-symbol svg{width:21px;height:21px;color:#64775f}.cover-steps+.progress-panel{margin-top:0}
@media(max-width:700px){.hero.editorial-cover{padding:30px 0 25px}.editorial-cover .eyebrow{font-size:9px;letter-spacing:2px}.editorial-cover h1{font-size:34px;letter-spacing:1px;line-height:1.35;margin:16px 0 12px}.editorial-cover h1 span{display:block}.editorial-cover .intro{font-size:11px;letter-spacing:0}.editorial-cover .start-link{font-size:13px;min-height:46px;padding:11px 22px;margin-top:18px}.cover-steps.learning-steps{margin-bottom:22px;padding:15px 0;font-size:11px;letter-spacing:0}.cover-steps li{flex-direction:column;gap:8px}.step-symbol{gap:8px}.cover-steps b{font-size:17px}.step-symbol svg{width:18px;height:18px}}
@media(max-width:360px){.editorial-cover h1{font-size:30px}.editorial-cover .intro{font-size:10px}.cover-steps.learning-steps{font-size:11px}}

/* 标题用布局间距分隔；保持原有颜色与字号。 */
.editorial-cover h1{display:flex;justify-content:center;align-items:baseline;flex-wrap:wrap;column-gap:.4em;row-gap:.08em}.editorial-cover h1 .title-first{color:var(--ink)}.editorial-cover h1 .title-accent{color:#778461}
@media(max-width:700px){.editorial-cover h1{flex-direction:column;align-items:center}}

/* 官方品牌替换：仅导航栏；原图等比例显示、无底块或装饰。 */
.site-header{height:auto;min-height:112px;padding-top:10px;padding-bottom:10px;gap:24px}.site-header .brand{display:block;flex:0 0 auto;line-height:0}.brand-logo{display:block;width:310px;height:auto;object-fit:contain;border:0;box-shadow:none;background:transparent}.site-header .header-links{display:flex;margin-left:auto;margin-right:0;gap:30px;flex:0 0 auto}.site-header .header-links a{display:flex;align-items:center;justify-content:center;min-height:44px;white-space:nowrap}@media(min-width:701px) and (max-width:1100px){.brand-logo{width:280px}.site-header{min-height:104px}}@media(max-width:700px){.site-header{min-height:80px;gap:12px;padding-top:8px;padding-bottom:8px}.brand-logo{width:clamp(170px,47.5vw,190px)}.site-header .header-links{gap:14px;font-size:12px;letter-spacing:0}.site-header .header-links a{padding:8px 0}}@media(max-width:360px){.site-header{gap:8px}.site-header .header-links{gap:8px;font-size:11px}}