:root{--ink:#182a33;--muted:#687984;--teal:#117d76;--teal-d:#08615b;--line:#e0e8e7;--paper:#fbfaf6;--white:#fff;--mint:#e7f5ef;--amber:#f8e9cf;--shadow:0 18px 50px rgba(24,42,51,.055);--radius:22px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft Yahei",sans-serif;-webkit-font-smoothing:antialiased}button,input,select,textarea{font:inherit}button{cursor:pointer}a{text-decoration:none;color:inherit}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid #a9dfcd;outline-offset:3px}button:disabled{opacity:.5;cursor:not-allowed}.shell{max-width:1192px;margin:0 auto;padding:0 28px}.topbar{position:sticky;top:0;z-index:30;background:rgba(251,250,246,.93);backdrop-filter:blur(18px);border-bottom:1px solid rgba(29,89,82,.08)}.nav-inner{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:30px}.brand{display:flex;align-items:center;gap:12px;white-space:nowrap;font-size:19px;font-weight:850;letter-spacing:-.5px}.brand-logo{display:grid;place-items:center;width:40px;height:40px;border-radius:13px;background:var(--teal);color:white;font-family:Georgia,serif;font-size:24px;font-style:italic}.brand small{display:block;color:var(--muted);font-size:10px;letter-spacing:1.8px;font-weight:700;margin-top:1px}.nav-links{display:flex;align-items:center;gap:28px;font-size:14px;font-weight:620;color:#465862}.nav-links a:hover,.nav-links a.current{color:var(--teal)}.nav-cta{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--ink);color:white!important;padding:12px 20px;border-radius:999px;font-size:13px;white-space:nowrap}.nav-cta:hover{background:var(--teal-d)}.menu-toggle{display:none;border:0;background:transparent;color:var(--ink);font-size:23px}.pill{display:inline-flex;align-items:center;gap:7px;padding:8px 12px;border-radius:99px;border:1px solid #d3e6db;background:#f0f8f2;color:#277365;font-weight:700;font-size:12px;letter-spacing:.2px}.pill-dot{width:7px;height:7px;background:#3dbd96;border-radius:50%}.hero{position:relative;padding:94px 0 84px;overflow:hidden}.hero:before{content:"";position:absolute;left:-140px;top:90px;width:520px;height:520px;background:radial-gradient(ellipse,#def5e7aa,transparent 68%);pointer-events:none}.hero-grid{position:relative;display:grid;grid-template-columns:1.1fr .9fr;align-items:center;gap:54px}.eyebrow{font-size:13px;font-weight:800;color:var(--teal);letter-spacing:1.7px;text-transform:uppercase;margin:0 0 22px}.hero h1{font-family:Georgia,"Noto Serif SC",serif;letter-spacing:-1.7px;line-height:1.21;font-size:clamp(38px,5vw,64px);margin:0 0 26px;font-weight:700}.hero h1 em{color:var(--teal);font-style:normal}.hero-copy{font-size:17px;line-height:1.92;color:#60717a;max-width:520px;margin:0 0 34px}.hero-actions{display:flex;flex-wrap:wrap;gap:13px;align-items:center}.btn{display:inline-flex;gap:9px;align-items:center;justify-content:center;white-space:nowrap;min-height:45px;border:1px solid transparent;padding:12px 20px;border-radius:13px;font-size:14px;font-weight:750;transition:transform .16s,background .16s}.btn:hover{transform:translateY(-2px)}.btn-primary{background:var(--teal);color:white}.btn-primary:hover{background:var(--teal-d)}.btn-outline{background:white;color:var(--ink);border-color:var(--line)}.btn-dark{background:var(--ink);color:white}.btn-text{color:var(--teal);background:transparent;padding:10px}.hero-trust{display:flex;gap:20px;margin-top:32px;flex-wrap:wrap;font-size:12px;font-weight:650;color:var(--muted)}.hero-trust span::before{content:"✓";display:inline-grid;place-items:center;width:19px;height:19px;border-radius:50%;background:#deeee7;color:var(--teal);margin-right:6px}.hero-art{position:relative;min-height:420px}.floating-note{position:absolute;right:2%;bottom:12px;z-index:2;background:var(--white);padding:14px 19px;border-radius:15px;box-shadow:var(--shadow);font-size:13px;font-weight:740;color:#526b6d}.reading-demo{position:absolute;left:3%;top:5%;right:5%;min-height:387px;padding:30px;border-radius:28px;background:#fff;box-shadow:0 38px 85px rgba(44,91,78,.14);transform:rotate(2deg);border:1px solid #eaf0eb}.demo-top{display:flex;justify-content:space-between;color:#88949d;font-size:11px;font-weight:750;letter-spacing:2px;margin-bottom:35px}.demo-label{font-weight:800;font-size:12px;color:var(--teal)}.demo-english{font-family:Georgia,serif;font-size:26px;line-height:1.58;letter-spacing:-.5px;margin:0 0 14px}.demo-english mark{background:#d8f2e6;border-radius:5px;color:var(--teal-d);padding:0 4px}.demo-chinese{font-size:13px;line-height:2;color:#71818b}.demo-player{display:flex;align-items:center;gap:12px;border-top:1px solid #ebf0ec;padding-top:23px;margin-top:25px}.demo-play{display:grid;place-items:center;width:47px;height:47px;background:var(--teal);border-radius:50%;color:white;font-size:19px}.demo-wave{display:flex;align-items:center;gap:4px;flex:1}.demo-wave i{display:block;width:5px;height:var(--h);background:#beded3;border-radius:9px}.demo-wave i:nth-child(3n){background:#268d78}.demo-time{font-size:11px;font-weight:700;color:#74868a}.section{padding:54px 0 70px}.section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:29px}.section-heading{font-family:Georgia,"Noto Serif SC",serif;font-size:36px;letter-spacing:-1px;margin:0 0 10px}.section-sub{margin:0;color:var(--muted);line-height:1.8;font-size:14px}.link-more{color:var(--teal);font-size:14px;font-weight:780}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.article-card{position:relative;display:flex;flex-direction:column;min-height:279px;padding:25px 26px 22px;border:1px solid var(--line);border-radius:22px;background:white;transition:transform .2s,box-shadow .2s,border-color .2s}.article-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:#a4cbbd}.card-tags{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:25px}.tag{display:inline-flex;align-items:center;background:#eef5f2;padding:5px 9px;border-radius:7px;font-size:11px;color:#276f63;font-weight:750}.tag.alt{background:#f8f0e2;color:#957038}.article-card h3{font-family:Georgia,serif;font-size:23px;line-height:1.34;margin:0 0 8px;letter-spacing:-.5px}.card-cn{margin:0;color:#536873;font-size:14px;font-weight:700}.card-desc{font-size:13px;color:#76848b;line-height:1.76;margin:17px 0 auto}.card-footer{display:flex;justify-content:space-between;align-items:center;margin-top:24px;padding-top:17px;border-top:1px solid #eff2f0}.wordcount{font-size:12px;color:#7f8b94}.card-arrow{display:grid;place-items:center;border-radius:50%;width:30px;height:30px;background:var(--mint);color:var(--teal);font-weight:800}.band-section{padding:30px 0 80px}.how{background:#133b3a;border-radius:30px;padding:42px 49px;color:#fff;display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.how-item{padding:14px 10px}.how-number{color:#a5e5cc;font-size:12px;font-weight:800;letter-spacing:2px}.how-item h3{font-family:Georgia,"Noto Serif SC",serif;font-size:21px;margin:14px 0 12px}.how-item p{color:#b9d0c8;font-size:13px;line-height:1.9;margin:0}.footer{background:#153532;color:#cee0d9;padding:44px 0 28px;margin-top:46px}.footer-body{display:flex;justify-content:space-between;align-items:start;gap:20px}.footer .brand{color:white}.footer p{font-size:13px;line-height:1.8;max-width:430px}.footer-links{display:flex;gap:24px;font-size:13px}.footer-links a:hover{color:white}.copyright{border-top:1px solid #355651;margin-top:32px;padding-top:23px;color:#94aaa2;font-size:12px}.page-top{padding:57px 0 32px}.page-top h1{font-family:Georgia,"Noto Serif SC",serif;font-size:clamp(33px,4.3vw,48px);margin:5px 0 15px}.page-top p{color:var(--muted);line-height:1.8;margin:0}.filters{background:white;border:1px solid var(--line);border-radius:20px;padding:20px;display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:12px;margin-bottom:24px}.filters input,.filters select{min-width:0;width:100%;min-height:46px;border:1px solid #dfe8e6;border-radius:11px;padding:12px 14px;background:#fff;color:#3d535e;outline:none}.filters input:focus,.filters select:focus{border-color:#57a698}.countbar{font-size:13px;color:#7c8a90;margin-bottom:21px}.empty{padding:70px 20px;text-align:center;border:1px dashed #ccdad5;border-radius:20px;background:white;color:#71818b}.bread{display:flex;gap:9px;align-items:center;flex-wrap:wrap;color:#87938f;font-size:12px;padding:36px 0 23px}.bread a:hover{color:var(--teal)}.reading-layout{display:grid;grid-template-columns:minmax(0,1fr) 270px;gap:30px;align-items:start}.reader-card{background:#fff;border:1px solid #e1e9e5;box-shadow:var(--shadow);border-radius:25px;overflow:hidden;min-width:0}.reader-intro{padding:36px 43px 27px;border-bottom:1px solid #edf0ed}.reader-intro h1{font-family:Georgia,serif;font-size:clamp(29px,3.4vw,43px);letter-spacing:-.8px;line-height:1.24;margin:17px 0 10px}.reader-intro .subtitle{margin:0 0 12px;font-size:16px;font-weight:680;color:#526874}.reader-intro .description{font-size:13px;color:#7b8b90;line-height:1.8;margin:0}.reader-tools{position:sticky;top:76px;z-index:20;display:flex;flex-wrap:wrap;gap:8px;padding:13px 28px;align-items:center;border-bottom:1px solid #e5ece8;background:#f7fbf8}.tool-button,.tool-select{border:1px solid #d4e4dd;border-radius:10px;padding:9px 12px;background:white;color:#345f5a;font-size:12px;font-weight:760;min-height:40px}.tool-button.active{background:var(--teal);border-color:var(--teal);color:#fff}.tool-button.tool-main{background:var(--teal);border-color:var(--teal);color:#fff}.tool-button:hover{border-color:var(--teal)}.tool-select{max-width:175px}.tool-split{width:1px;height:20px;background:#d2ded8;margin:0 3px}.reader-feedback{display:flex;gap:9px;align-items:center;font-size:12px;color:#668276;min-height:36px;padding:7px 43px;background:#f5faf7;border-bottom:1px solid #e9f1ed}.feedback-dot{height:7px;width:7px;background:#76c8a7;border-radius:50%}.reader-body{padding:36px 43px 43px;font-size:19px;line-height:2.08;font-family:Georgia,"Times New Roman",serif;color:#243943}.reader-body[data-size=large]{font-size:22px}.reader-body[data-size=largest]{font-size:25px}.reading-paragraph{margin:0 0 32px}.reading-paragraph:last-child{margin-bottom:0}.sentence-unit{display:inline}.sentence-sound{display:inline-flex;align-items:center;justify-content:center;vertical-align:baseline;margin:0 6px 0 1px;border:0;border-radius:7px;padding:2px 4px;background:transparent;color:#2f9d8b;font-size:13px;line-height:1.4}.sentence-sound:hover,.sentence-sound:focus-visible{background:#e7f7f0}.sentence-text{border-radius:5px;transition:background .14s}.sentence-text.sentence-active{background:#daf3e5;box-shadow:0 0 0 3px #daf3e5}.word{font:inherit;background:none;border:0;padding:0 0 1px;margin:0;color:inherit;vertical-align:baseline;line-height:inherit;border-radius:4px;cursor:pointer}.word:hover,.word:focus-visible{background:#e5f4ec;color:#057569}.word.word-active{background:#d1f1e1;color:#00695f}.zh-para{font-family:Inter,"PingFang SC",sans-serif;font-size:14px;line-height:2.1;color:#778b88;padding:12px 19px 16px;margin:-17px 0 28px;background:#f6faf7;border-left:3px solid #a1cab4;border-radius:0 10px 10px 0}.zh-para[hidden]{display:none}.reader-note{margin:0 43px 34px;padding-top:18px;border-top:1px solid #eff2ef;color:#83918c;font-size:12px;line-height:1.8}.side-card{padding:23px;border:1px solid var(--line);border-radius:19px;background:white;margin-bottom:18px}.side-card h3{font-size:15px;margin:0 0 17px}.side-card p{color:#708086;line-height:1.8;font-size:13px}.side-steps{display:flex;flex-direction:column;gap:20px}.side-step{display:flex;gap:13px;align-items:start}.side-step b{width:28px;height:28px;display:grid;place-items:center;background:#e8f5ee;border-radius:9px;color:#15786b;font-size:12px;flex-shrink:0}.side-step span{font-size:13px;line-height:1.6;color:#5c7475}.side-step strong{display:block;color:var(--ink);margin-bottom:3px}.aside-related{display:block;padding:14px 0;border-top:1px solid #eef1ee;font-size:13px;line-height:1.5;color:#415e63;font-weight:650}.aside-related span{display:block;font-size:11px;font-weight:500;color:#9aaba4;margin-top:5px}.aside-related:hover{color:var(--teal)}.share-row{display:flex;gap:9px;margin-top:20px;flex-wrap:wrap}.share-row button{background:white;border:1px solid var(--line);padding:9px 13px;border-radius:10px;font-size:12px;color:#536a6a}.end-cta{margin-top:25px;padding:25px;border-radius:17px;background:#eaf5ec;line-height:1.8}.end-cta strong{font-size:16px}.end-cta p{font-size:13px;color:#5e7b74}.end-cta a{display:inline-flex;font-size:13px;font-weight:750;color:#08746b}.focus-mode .topbar,.focus-mode .reading-sidebar,.focus-mode .footer,.focus-mode .bread{display:none}.focus-mode .reading-layout{display:block;max-width:815px;margin:auto}.focus-mode .reader-card{border:0;box-shadow:none}.focus-mode .reader-tools{top:0}.simple-copy{max-width:840px;background:white;border:1px solid var(--line);border-radius:24px;padding:45px;font-size:15px;line-height:2;color:#50626d}.simple-copy h2{color:var(--ink)}.simple-copy p{margin-bottom:20px}.attention{background:#edf6f1;color:#386b5e;padding:16px 20px;border-radius:12px;font-size:13px;line-height:1.8}.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);z-index:100;background:#173f38;color:white;border-radius:12px;padding:12px 20px;box-shadow:0 10px 30px #224e4033;font-size:13px;max-width:90vw}.toast[hidden]{display:none}[hidden]{display:none!important}@media(max-width:1000px){.hero-grid{gap:24px}.cards{grid-template-columns:repeat(2,1fr)}.reading-layout{grid-template-columns:minmax(0,1fr) 235px;gap:18px}.filters{grid-template-columns:1fr 1fr}}@media(max-width:760px){.shell{padding:0 17px}.nav-inner{min-height:65px}.brand{font-size:17px}.brand-logo{width:36px;height:36px}.nav-links{display:none;position:absolute;top:65px;left:0;right:0;background:var(--paper);padding:15px 22px 22px;box-shadow:0 18px 23px #12292314;flex-direction:column;align-items:stretch;gap:19px}.nav-links.open{display:flex}.menu-toggle{display:block}.hero{padding:54px 0 50px}.hero-grid{display:block}.hero h1{font-size:clamp(39px,10vw,54px)}.hero-copy{font-size:15px}.hero-art{min-height:348px;margin-top:52px}.reading-demo{left:3%;right:5%;min-height:324px;padding:23px}.demo-top{margin-bottom:25px}.demo-english{font-size:23px}.cards{grid-template-columns:1fr;gap:14px}.article-card{min-height:235px}.section{padding:38px 0 49px}.section-heading{font-size:29px}.how{padding:25px;grid-template-columns:1fr;gap:4px}.how-item{padding:10px}.section-head{align-items:start}.footer-body{display:block}.footer-links{margin-top:24px}.page-top{padding:37px 0 27px}.page-top h1{font-size:34px}.filters{grid-template-columns:1fr 1fr}.filters input{grid-column:1/-1}.reading-layout{display:block}.reading-sidebar{margin-top:22px}.reader-intro{padding:28px 22px 20px}.reader-intro h1{font-size:30px}.reader-tools{top:65px;padding:12px;gap:7px}.tool-button,.tool-select{font-size:12px;padding:8px 9px}.tool-split{display:none}.reader-feedback{padding:9px 22px}.reader-body{padding:27px 23px 30px;font-size:18px;line-height:2.1}.reader-body[data-size=large]{font-size:20px}.reader-body[data-size=largest]{font-size:23px}.sentence-sound{font-size:13px;padding:4px}.reader-note{margin:0 23px 25px}.simple-copy{padding:24px}.side-card{padding:22px}.reader-card{border-radius:18px}.bread{padding:22px 0 16px}.word{min-height:25px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}

/* V2.4 手机优先查词卡与触控调整 */
.word-sheet{position:fixed;z-index:90;bottom:24px;left:50%;transform:translateX(-50%);width:min(420px,calc(100vw - 28px));padding:22px 23px 20px;border-radius:21px;background:white;box-shadow:0 16px 60px #1e544a35;border:1px solid #d8e7de;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC",sans-serif;color:#24413a}.word-sheet[hidden]{display:none}.word-sheet-grip{display:none}.word-sheet-top{display:flex;align-items:start;justify-content:space-between;gap:10px}.word-sheet-top strong{display:block;font-size:26px;line-height:1.3;letter-spacing:-.5px}.word-sheet-top span{font-size:13px;color:#7a8c86}.word-sheet-top button{background:#f1f6f3;border:0;border-radius:50%;height:35px;width:35px;font-size:17px;color:#5b736e}.word-sheet-meaning{font-size:18px;font-weight:700;margin:18px 0 7px;line-height:1.7}.word-sheet-meta{font-size:12px;color:#71867e;margin:0 0 15px}.word-sheet-speak{width:100%;background:#e9f7ee;color:#09675f;border:0;border-radius:12px;min-height:44px;font-weight:780}.word{touch-action:manipulation}.sentence-sound{min-width:28px;min-height:29px;touch-action:manipulation}.reading-paragraph{overflow-wrap:anywhere}@media(max-width:760px){.reader-tools{display:flex;flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;overscroll-behavior-x:contain;-webkit-overflow-scrolling:touch}.reader-tools>*{flex-shrink:0}.reader-tools::-webkit-scrollbar{display:none}.reader-tools .tool-button,.reader-tools .tool-select{min-height:44px}.word-sheet{bottom:0;left:0;transform:none;width:100%;max-width:none;padding:15px 21px calc(20px + env(safe-area-inset-bottom,0px));border-radius:22px 22px 0 0;box-shadow:0 -12px 55px #1e544a35}.word-sheet-grip{display:block;height:5px;width:48px;background:#ccdcd3;border-radius:99px;margin:0 auto 15px}.word{min-height:30px}.sentence-sound{min-width:34px;min-height:34px}}