:root{--ink:#17211f;--muted:#596865;--paper:#f7f4ed;--surface:#fffdf8;--surface-strong:#fff;--line:#dfe4df;--green:#173f3a;--green-2:#285e55;--green-soft:#e4efea;--coral:#d96445;--coral-soft:#f8e5dc;--gold:#e6bb58;--shadow:0 18px 45px #173f3a17;--radius:22px;--shell:min(1180px, calc(100% - 40px));color:var(--ink);background:var(--paper);font-synthesis:none;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--paper);min-width:320px;color:var(--ink);margin:0;line-height:1.65}a{color:var(--green-2);text-underline-offset:.2em}a:hover{color:var(--coral)}img,svg{max-width:100%;display:block}button,input{font:inherit}button,a{-webkit-tap-highlight-color:transparent}.audio-note{color:var(--muted);border-left:3px solid var(--line);margin-top:4px;padding-left:12px;font-size:.86rem}.notice-link{border-left:3px solid var(--accent,#1a56db);background:#1a56db0f;border-radius:4px;padding:10px 14px;font-size:.92rem}.study-status-btns{flex-wrap:wrap;gap:4px;display:inline-flex}.study-status-btns button{border:1px solid var(--line);color:var(--muted);cursor:pointer;background:#fff;border-radius:999px;padding:3px 8px;font-size:.72rem;transition:all .12s}.study-status-btns button:hover{border-color:var(--green);color:var(--green)}.study-status-btns button.is-active[data-mark=known]{background:var(--green);border-color:var(--green);color:#fff}.study-status-btns button.is-active[data-mark=learning]{color:#fff;background:#c8932f;border-color:#c8932f}.study-status-btns button.is-active[data-mark=difficult]{color:#fff;background:#b4452f;border-color:#b4452f}:focus-visible{outline:3px solid var(--gold);outline-offset:3px}.shell{width:var(--shell);margin-inline:auto}.skip-link{z-index:100;background:var(--ink);color:#fff;border-radius:10px;padding:10px 16px;position:fixed;top:10px;left:16px;transform:translateY(-160%)}.skip-link:focus{transform:none}.site-header{z-index:20;backdrop-filter:blur(16px);background:#f7f4eded;border-bottom:1px solid #173f3a1f;position:sticky;top:0}.header-inner{align-items:center;gap:28px;min-height:72px;display:flex}.brand{color:var(--green);letter-spacing:-.02em;align-items:center;gap:10px;font-weight:780;text-decoration:none;display:inline-flex}.brand-mark{background:var(--green);color:#fff;border-radius:12px;place-items:center;width:36px;height:36px;font-family:ui-serif,Noto Serif CJK SC,serif;font-size:21px;display:grid;box-shadow:0 6px 18px #173f3a2e}.primary-nav{align-items:center;gap:24px;margin-left:auto;display:flex}.primary-nav a,.primary-nav summary,.search-link{color:var(--ink);font-size:.94rem;font-weight:650;text-decoration:none}.primary-nav .nav-primary{color:var(--green);font-weight:820}.primary-nav a:hover,.primary-nav summary:hover,.search-link:hover{color:var(--coral)}.nav-dropdown{position:relative}.nav-dropdown summary{cursor:pointer;list-style:none}.nav-dropdown summary::-webkit-details-marker{display:none}.nav-dropdown summary:after{content:" ▾";font-size:.72em}.nav-dropdown-menu{border:1px solid var(--line);background:var(--surface);border-radius:14px;min-width:170px;padding:8px;position:absolute;top:calc(100% + 14px);left:50%;transform:translate(-50%);box-shadow:0 16px 40px #173f3a29}.nav-dropdown-menu a{border-radius:9px;padding:9px 11px;display:block}.nav-dropdown-menu a:hover{background:var(--mist)}.language-switcher{position:relative}.language-switcher summary{cursor:pointer;border:1px solid var(--line);min-height:42px;color:var(--ink);background:#ffffff7a;border-radius:999px;align-items:center;gap:9px;padding:0 14px;font-size:.94rem;font-weight:650;list-style:none;display:inline-flex}.language-switcher summary::-webkit-details-marker{display:none}.language-switcher summary svg{fill:none;stroke:currentColor;stroke-width:1.8px;width:20px;height:20px}.language-switcher summary i{font-size:1.1rem;font-style:normal;line-height:1;transform:translateY(-2px)}.language-switcher[open] summary{background:var(--surface);border-color:#173f3a59}.language-menu{border:1px solid var(--line);background:var(--surface);border-radius:14px;min-width:194px;padding:8px;position:absolute;top:calc(100% + 10px);right:0;box-shadow:0 16px 40px #173f3a29}.language-menu a{color:var(--ink);border-radius:9px;justify-content:space-between;align-items:center;gap:20px;padding:10px 12px;font-size:.96rem;font-weight:560;text-decoration:none;display:flex}.language-menu a:hover{background:var(--mist)}.language-menu b{color:var(--green);font-weight:800}.mobile-menu{margin-left:auto;display:none;position:relative}.mobile-menu summary{cursor:pointer;border:1px solid var(--line);background:var(--surface);border-radius:999px;padding:9px 13px;font-weight:700;list-style:none}.mobile-menu summary::-webkit-details-marker{display:none}.mobile-menu nav{border:1px solid var(--line);background:var(--surface);border-radius:16px;width:min(280px,100vw - 28px);padding:12px;position:absolute;top:calc(100% + 12px);right:0;box-shadow:0 16px 40px #173f3a29}.mobile-menu nav a,.mobile-menu nav span{color:var(--ink);padding:9px 10px;text-decoration:none;display:block}.mobile-menu nav span{color:var(--muted);text-transform:uppercase;letter-spacing:.08em;padding-bottom:3px;font-size:.78rem;font-weight:800}.mobile-menu nav span~a:nth-of-type(-n+5){padding-left:20px}.search-link{border:1px solid var(--line);background:var(--surface);border-radius:999px;align-items:center;gap:8px;padding:9px 13px;display:inline-flex}.search-link svg,.filter-control svg{fill:none;stroke:currentColor;stroke-width:1.8px;width:18px}.pinyin-with-audio{align-items:center;gap:8px;display:inline-flex}.pinyin-with-audio>span,.word-table td:nth-child(2)>span{gap:2px;display:grid}.pinyin-with-audio small,.word-table td:nth-child(2) small{color:var(--muted);font-size:.75rem}.pronounce-button{border:1px solid var(--line);background:var(--surface);min-width:38px;min-height:38px;color:var(--green);cursor:pointer;border-radius:999px;justify-content:center;align-items:center;gap:6px;padding:7px 10px;display:inline-flex}.pronounce-button:hover{border-color:var(--green);background:var(--mist)}.pronounce-button svg{fill:none;stroke:currentColor;stroke-width:1.8px;stroke-linecap:round;stroke-linejoin:round;width:18px;height:18px}.pronounce-button-compact{min-width:32px;min-height:32px;padding:5px}.hero{background:radial-gradient(circle at 78% 24%,#e6bb5838,#0000 24rem),linear-gradient(150deg,#f7f4ed 10%,#e9f0e8 100%);padding:84px 0 72px;overflow:hidden}.hero-grid{grid-template-columns:minmax(0,1.18fr) minmax(360px,.82fr);align-items:center;gap:72px;display:grid}.eyebrow{color:var(--coral);letter-spacing:.13em;text-transform:uppercase;align-items:center;gap:8px;font-size:.78rem;font-weight:800;display:inline-flex}.eyebrow:before{content:"";background:currentColor;width:22px;height:2px}.hero h1,.page-hero h1{color:var(--green);letter-spacing:-.055em;margin:16px 0 20px;font-family:Georgia,Times New Roman,serif;font-size:clamp(3rem,7vw,5.75rem);font-weight:500;line-height:.98}.hero h1 em{color:var(--coral);font-style:normal}.hero-copy{max-width:680px;color:var(--muted);margin:0;font-size:clamp(1.05rem,2vw,1.25rem)}.hero-actions{flex-wrap:wrap;gap:12px;margin-top:32px;display:flex}.button{border:1px solid var(--green);background:var(--green);color:#fff;border-radius:14px;justify-content:center;align-items:center;min-height:48px;padding:0 20px;font-weight:750;text-decoration:none;display:inline-flex;box-shadow:0 8px 22px #173f3a29}.button:hover{background:var(--green-2);color:#fff}.button-secondary{color:var(--green);box-shadow:none;background:0 0}.button-secondary:hover{background:var(--green-soft);color:var(--green)}.hero-panel{min-height:420px;box-shadow:var(--shadow);background:#fffdf8b8;border:1px solid #173f3a1f;border-radius:34px;padding:28px;position:relative}.hero-panel:before{content:"";pointer-events:none;border:1px dashed #173f3a2b;border-radius:24px;position:absolute;inset:14px}.character-stack{place-items:center;height:100%;display:grid;position:relative}.character-main{color:var(--green);font-family:Georgia,Noto Serif CJK SC,serif;font-size:clamp(8rem,18vw,13rem);line-height:1}.character-note{background:var(--surface-strong);border-radius:14px;padding:12px 16px;font-weight:700;position:absolute;box-shadow:0 12px 30px #173f3a1f}.note-one{top:22px;right:4px;transform:rotate(3deg)}.note-two{bottom:20px;left:0;transform:rotate(-3deg)}.section{padding:76px 0}.section-tight{padding:52px 0}.section-green{background:var(--green);color:#fff}.section-heading{justify-content:space-between;align-items:end;gap:28px;margin-bottom:30px;display:flex}.section-heading h2,.content-section h2{color:var(--green);letter-spacing:-.035em;margin:0;font-family:Georgia,Times New Roman,serif;font-size:clamp(2rem,4vw,3.2rem);font-weight:500;line-height:1.1}.section-heading p{max-width:600px;color:var(--muted);margin:0}.section-green .section-heading h2,.section-green .section-heading p{color:#fff}.version-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;display:grid}.version-card{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);min-height:370px;color:var(--ink);flex-direction:column;padding:34px;text-decoration:none;transition:transform .2s,box-shadow .2s;display:flex;position:relative;overflow:hidden;box-shadow:0 10px 30px #173f3a0f}.version-card:hover{color:var(--ink);box-shadow:var(--shadow);transform:translateY(-4px)}.version-card:after{content:attr(data-mark);color:#173f3a0f;font-family:Georgia,serif;font-size:11rem;line-height:1;position:absolute;bottom:-38px;right:-8px}.version-card-new{background:#edf4ef}.pill{background:var(--green-soft);width:fit-content;color:var(--green);letter-spacing:.06em;text-transform:uppercase;border-radius:999px;padding:6px 10px;font-size:.76rem;font-weight:800;display:inline-flex}.pill-coral{background:var(--coral-soft);color:#9e3f29}.version-card h3{color:var(--green);letter-spacing:-.04em;margin:30px 0 12px;font-family:Georgia,serif;font-size:2.6rem;font-weight:500}.version-card p{max-width:520px;color:var(--muted)}.version-meta{gap:24px;margin-top:auto;padding-top:28px;display:flex}.version-meta span{color:var(--muted);gap:2px;font-size:.85rem;display:grid}.version-meta strong{color:var(--ink);font-size:1.15rem}.text-link{color:var(--green-2);align-items:center;gap:6px;font-weight:800;display:inline-flex}.status-note{background:#fff9e8;border:1px solid #d8c58e;border-radius:18px;grid-template-columns:auto 1fr;gap:18px;padding:24px;display:grid}.status-note h2{margin:0 0 6px;font-size:1.05rem}.status-note p{color:#665a36;margin:0}.status-icon{background:var(--gold);color:#4a3a11;border-radius:50%;place-items:center;width:34px;height:34px;font-family:Georgia,serif;font-weight:800;display:grid}.source-line{font-size:.86rem;margin-top:8px!important}.page-hero{border-bottom:1px solid var(--line);background:linear-gradient(160deg,#f7f4ed,#edf3ef);padding:56px 0 48px}.page-hero h1{max-width:900px;font-size:clamp(2.7rem,6vw,5rem)}.page-lede{max-width:760px;color:var(--muted);margin:0;font-size:1.16rem}.hero-stats{flex-wrap:wrap;gap:12px;margin-top:28px;display:flex}.stat-chip{border:1px solid var(--line);color:var(--muted);background:#ffffffb8;border-radius:12px;align-items:baseline;gap:7px;padding:10px 14px;font-size:.88rem;display:inline-flex}.stat-chip strong{color:var(--green);font-size:1.1rem}.breadcrumbs{color:var(--muted);margin-bottom:22px;font-size:.86rem}.breadcrumbs ol{flex-wrap:wrap;gap:8px;margin:0;padding:0;list-style:none;display:flex}.breadcrumbs li:not(:last-child):after{content:"/";color:#a0aaa7;margin-left:8px}.breadcrumbs a{color:var(--muted);text-decoration:none}.course-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;display:grid}.course-card{border:1px solid var(--line);background:var(--surface);min-height:315px;color:var(--ink);border-radius:20px;flex-direction:column;padding:26px;text-decoration:none;transition:transform .2s,border-color .2s;display:flex}.course-card:hover{color:var(--ink);border-color:#b7c8c2;transform:translateY(-3px)}.lesson-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;display:grid}.lesson-card{border:1px solid var(--line);background:var(--surface);border-radius:18px;padding:24px}.lesson-card h3{margin:10px 0}.lesson-card .button{margin-top:8px}.lesson-shell{max-width:980px}.lesson-steps{border:1px solid var(--line);background:var(--surface);border-radius:14px;gap:8px;margin-bottom:22px;padding:10px;display:flex;overflow-x:auto}.lesson-steps a{color:var(--green);border-radius:9px;flex:none;padding:8px 12px;font-weight:750;text-decoration:none}.lesson-steps a:hover{background:var(--cream)}.lesson-section{border-bottom:1px solid var(--line);padding-block:12px 30px;scroll-margin-top:24px}.task-source-card,.output-frame{border-left:4px solid var(--gold);background:#fff9e8;border-radius:0 12px 12px 0;padding:18px}.task-source-card p{margin:6px 0}.lesson-vocabulary-grid,.grammar-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;display:grid}.lesson-vocabulary-grid article,.grammar-grid article{border:1px solid var(--line);background:var(--surface);border-radius:13px;padding:16px}.lesson-vocabulary-grid h3,.grammar-grid h3{margin:0 0 6px}.lesson-vocabulary-grid p,.grammar-grid p{margin:5px 0}.lesson-heading-row{justify-content:space-between;align-items:flex-start;gap:20px;display:flex}.lesson-heading-row>div:last-child{justify-items:center;gap:5px;display:grid}.dialogue-card{gap:12px;display:grid}.dialogue-card article{border:1px solid var(--line);background:var(--surface);border-radius:14px;padding:18px}.dialogue-card h3{color:var(--coral);margin:0 0 8px}.dialogue-chinese{color:var(--green);margin:0;font-size:1.3rem;font-weight:760}.dialogue-pinyin{color:var(--muted);margin:5px 0}.lesson-output-label{margin:16px 0 7px;font-weight:760;display:block}.lesson-section textarea{border:1px solid var(--line);background:var(--surface);width:100%;color:var(--ink);font:inherit;resize:vertical;border-radius:12px;padding:14px}.lesson-section textarea:focus{border-color:var(--green);outline:3px solid #173f3a1f}.lesson-checklist{gap:10px;margin:18px 0;display:grid}.lesson-checklist label{border:1px solid var(--line);background:var(--surface);border-radius:10px;align-items:flex-start;gap:10px;padding:12px;display:flex}.lesson-progress{color:var(--muted)}.listening-player{border:1px solid var(--line);background:var(--cream);border-radius:14px;align-items:center;gap:16px;margin:20px 0;padding:18px;display:flex}.listening-player p{color:var(--muted);margin:4px 0 0}[data-writing-answer]{border:1px solid var(--line);background:var(--surface);width:100%;color:var(--ink);font:inherit;resize:vertical;border-radius:12px;padding:14px;line-height:1.7}[data-writing-answer]:focus{border-color:var(--green);outline:3px solid #173f3a1f}.course-number{color:var(--green);margin:18px 0 10px;font-family:Georgia,serif;font-size:2.1rem;display:block}.course-summary{color:var(--muted)}.course-meta{color:var(--muted);margin-top:auto;padding:22px 0 18px;font-size:.86rem;display:grid}.course-meta strong{color:var(--ink);font-size:1.2rem}.course-meta em{font-style:normal}.split-layout{grid-template-columns:minmax(0,1fr) 320px;align-items:start;gap:54px;display:grid}.content-section{max-width:760px}.content-section h2{margin-top:46px;font-size:2.1rem}.content-section h3{color:var(--green);margin-top:32px;font-size:1.2rem}.content-section p,.content-section li{color:#3f4e4b}.content-section table{border-collapse:collapse;width:100%;margin:24px 0}.content-section th,.content-section td{border-bottom:1px solid var(--line);text-align:left;vertical-align:top;padding:13px 14px}.content-section th{color:var(--green);font-size:.86rem}.side-card{border:1px solid var(--line);background:var(--surface);border-radius:18px;align-self:start;padding:24px;position:sticky;top:96px}.side-card h2{color:var(--green);margin:0 0 12px;font-family:Georgia,serif;font-size:1.4rem}.side-card a{border-bottom:1px solid var(--line);padding:8px 0;text-decoration:none;display:block}.side-card a:last-child{border-bottom:0}.resource-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;display:grid}.resource-card{border:1px solid var(--line);background:var(--surface);border-radius:18px;padding:26px}.resource-card h2,.resource-card h3{color:var(--green);margin:8px 0 10px;font-family:Georgia,serif;font-size:1.55rem}.resource-card p{color:var(--muted)}.filter-panel{background:var(--green);color:#fff;border-radius:18px;gap:10px;margin-bottom:22px;padding:22px;display:grid}.filter-panel label{font-weight:800}.search-scope{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.search-scope label{font-size:.86rem}.search-scope select{min-height:40px;color:var(--ink);background:#fff;border:0;border-radius:10px;padding:0 36px 0 12px}.filter-control{position:relative}.filter-control svg{color:var(--green);position:absolute;top:50%;left:15px;transform:translateY(-50%)}.filter-control input{width:100%;min-height:52px;color:var(--ink);background:#fff;border:0;border-radius:13px;padding:0 16px 0 46px}.filter-help{color:#ffffffc7;margin:0;font-size:.84rem}.word-table-wrap{border:1px solid var(--line);background:var(--surface);border-radius:18px;overflow-x:auto}.word-table{border-collapse:collapse;width:100%;min-width:760px}.word-table th{border-bottom:1px solid var(--line);color:var(--green);text-align:left;letter-spacing:.04em;text-transform:uppercase;background:#edf2ee;padding:13px 16px;font-size:.78rem}.word-table td{vertical-align:top;border-bottom:1px solid #eceeea;padding:15px 16px}.word-table tr:last-child td{border-bottom:0}.word-table tr:hover td{background:#fbfaf6}.hanzi,.hanzi-link{color:var(--ink);font-family:Georgia,Noto Serif CJK SC,serif;font-size:1.45rem;font-weight:650;text-decoration:none;display:block}.hanzi-link:hover{color:var(--coral)}.word-table small{color:var(--muted);margin-top:2px;font-size:.75rem;display:block}.memberships{min-width:150px}.memberships a{text-decoration:none;display:inline-flex}.memberships span{background:var(--green-soft);color:var(--green);white-space:nowrap;border-radius:6px;margin:0 4px 4px 0;padding:3px 7px;font-size:.72rem;display:inline-flex}.memberships a:hover span{background:var(--green);color:#fff}.under-review{color:#8a6b2f;font-size:.85rem}.pagination{flex-wrap:wrap;justify-content:center;gap:8px;margin-top:26px;display:flex}.pagination a,.pagination span{border:1px solid var(--line);background:var(--surface);min-width:40px;height:40px;color:var(--green);border-radius:10px;place-items:center;padding:0 10px;text-decoration:none;display:grid}.pagination [aria-current=page]{border-color:var(--green);background:var(--green);color:#fff}.notice{border-left:3px solid var(--gold);color:#665a36;background:#fff9e8;padding:14px 16px}.comparison-hero .page-lede{max-width:850px}.comparison-body{padding-top:42px}.comparison-article{max-width:820px}.comparison-article section{scroll-margin-top:96px}.answer-card{background:linear-gradient(145deg,#edf4ef,#fffdf8);border:1px solid #c8d8d1;border-radius:22px;padding:30px;box-shadow:0 14px 36px #173f3a14}.answer-card h2{margin-top:12px}.answer-card p:last-of-type{margin-bottom:0}.answer-actions{flex-wrap:wrap;gap:10px;margin-top:24px;display:flex}.comparison-table-wrap{border:1px solid var(--line);background:var(--surface);border-radius:18px;margin:24px 0;overflow-x:auto}.content-section .comparison-table{min-width:680px;margin:0}.comparison-table thead{background:var(--green)}.content-section .comparison-table thead th{color:#fff}.comparison-table th,.comparison-table td{min-width:150px}.comparison-table tbody th{width:22%;color:var(--green);background:#f1f5f2}.comparison-table tbody tr:last-child th,.comparison-table tbody tr:last-child td{border-bottom:0}.content-section .comparison-table.compact-table{width:100%;min-width:0}.compact-table th,.compact-table td{text-align:center;padding:10px 8px;font-size:.9rem;min-width:0!important}.compact-table thead th{font-size:.8rem}@media (width<=600px){.compact-table th,.compact-table td{padding:8px 4px;font-size:.82rem}}.vocabulary-comparison td:not(:last-child){font-variant-numeric:tabular-nums}.scroll-cue{color:var(--muted);text-align:center;flex-direction:column;align-items:center;gap:4px;margin-top:-56px;padding:10px 0 6px;font-size:.85rem;display:flex}.scroll-cue-arrow{font-size:1.4rem;animation:1.6s infinite bounce-down}.scroll-cue-note{opacity:.7;max-width:400px;margin-top:4px;font-size:.78rem}@keyframes bounce-down{0%,to{transform:translateY(0)}50%{transform:translateY(6px)}}.fact-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin:26px 0;display:grid}.fact-grid article{border:1px solid var(--line);background:var(--surface);border-radius:16px;padding:20px}.fact-grid h3{margin:10px 0 8px;font-size:1.05rem}.fact-grid p{margin:0;font-size:.92rem}.fact-number{color:var(--coral);letter-spacing:.12em;font-size:.78rem;font-weight:850}.decision-list{gap:12px;margin-top:24px;display:grid}.decision-list article{border-left:4px solid var(--green-2);background:var(--surface);border-radius:0 15px 15px 0;padding:20px 22px}.decision-list h3{margin:0 0 6px}.decision-list p{margin:0}.step-list{counter-reset:guide-step;margin:24px 0;padding:0;list-style:none}.step-list li{counter-increment:guide-step;min-height:52px;margin-bottom:18px;padding-left:64px;position:relative}.step-list li:before{content:counter(guide-step);background:var(--green);color:#fff;border-radius:13px;place-items:center;width:42px;height:42px;font-weight:850;display:grid;position:absolute;top:0;left:0}.step-list strong{color:var(--green);display:block}.myth-list{gap:10px;padding:0;list-style:none;display:grid}.myth-list li{border:1px solid var(--line);background:var(--surface);border-radius:14px;padding:16px 18px}.faq-list{gap:10px;margin-top:24px;display:grid}.faq-list details{border:1px solid var(--line);background:var(--surface);border-radius:14px}.faq-list summary{cursor:pointer;color:var(--green);padding:17px 20px;font-weight:780}.faq-list details p{margin:0;padding:0 20px 18px}.side-card-divider{background:var(--line);height:1px;margin:18px 0}.comparison-nav h2:not(:first-child){margin-top:0}.author-byline{align-items:center;gap:13px;margin-top:24px;display:flex}.author-avatar{background:var(--green);color:#fff;border-radius:50%;flex:none;place-items:center;width:42px;height:42px;font-family:Georgia,serif;font-size:1.1rem;font-weight:800;text-decoration:none;display:grid}.author-byline p{color:var(--ink);margin:0;font-size:.88rem}.author-byline a:not(.author-avatar){font-weight:800}.author-byline .author-dates{color:var(--muted);margin-top:2px;font-size:.78rem}.author-card{border:1px solid var(--line);background:var(--surface);border-radius:18px;grid-template-columns:auto 1fr;gap:20px;margin-top:52px;padding:24px;display:grid}.author-card .author-avatar-large{width:58px;height:58px;font-size:1.4rem}.content-section .author-card h2{margin:5px 0 8px;font-size:1.55rem}.author-card h2 a{color:var(--green);text-decoration:none}.author-card p{margin:0 0 12px}.author-profile-heading{grid-template-columns:auto minmax(0,1fr);align-items:center;gap:28px;display:grid}.author-profile-heading h1{margin-bottom:12px}.author-avatar-profile{width:112px;height:112px;font-size:3rem}.author-article-list{gap:12px;display:grid}.author-article-list>a{border:1px solid var(--line);background:var(--surface);border-radius:15px;padding:18px 20px;text-decoration:none;display:block}.content-section .author-article-list h3{margin:0 0 5px}.author-article-list p{margin:0}.asset-section{border-bottom:1px solid var(--line);background:#f2f6f3}.asset-metrics{grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;display:grid}.asset-metrics>a{border:1px solid var(--line);background:var(--surface);min-height:205px;color:var(--ink);border-radius:18px;flex-direction:column;padding:22px;text-decoration:none;transition:transform .2s,border-color .2s;display:flex}.asset-metrics>a:hover{color:var(--ink);border-color:#afc3bb;transform:translateY(-3px)}.asset-metrics strong{color:var(--green);font-family:Georgia,serif;font-size:2.25rem;line-height:1}.asset-metrics span{margin-top:14px;font-weight:850}.asset-metrics small{color:var(--muted);margin-top:auto;padding-top:18px;line-height:1.5}.asset-method-link{text-align:right;margin:18px 0 0}.dataset-disclosure{color:#3f4e4b;background:#edf4ef;border:1px solid #c8d8d1;border-radius:15px;gap:6px;margin:24px 0;padding:18px 20px;font-size:.9rem;display:grid}.dataset-disclosure strong{color:var(--green)}.dataset-disclosure a{margin-top:4px;font-weight:800}.database-gateway{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:20px;display:grid}.database-gateway>a{border:1px solid var(--line);background:var(--surface);border-radius:15px;gap:6px;padding:19px 20px;text-decoration:none;display:grid}.database-gateway strong{color:var(--green)}.database-gateway span{color:var(--muted);font-size:.9rem;line-height:1.5}.word-hero-grid{grid-template-columns:minmax(0,1fr) auto;align-items:end;gap:28px;display:grid}.word-hanzi{color:var(--green);margin:0;font-family:Georgia,Noto Serif CJK SC,serif;font-size:clamp(5rem,12vw,9rem);font-weight:500;line-height:1}.word-pinyin{color:var(--coral);margin:8px 0 0;font-size:1.35rem;font-weight:750}.word-definition{max-width:680px;color:var(--muted);margin:16px 0 0;font-size:1.2rem}.membership-panel{flex-wrap:wrap;justify-content:end;gap:8px;display:flex}.membership-panel a{background:var(--green-soft);color:var(--green);border-radius:999px;padding:8px 11px;font-size:.82rem;font-weight:750;text-decoration:none}.example-list{gap:14px;padding:0;list-style:none;display:grid}.example-list li{border:1px solid var(--line);background:var(--surface);border-radius:16px;padding:20px}.example-chinese{color:var(--green);margin:0;font-family:Georgia,Noto Serif CJK SC,serif;font-size:1.35rem}.example-pinyin{color:var(--coral);margin:3px 0;font-size:.92rem}.example-english{color:var(--muted);margin:0}.guide-list{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;display:grid}.guide-card{border:1px solid var(--line);background:var(--surface);color:var(--ink);border-radius:18px;padding:24px;text-decoration:none}.guide-card:hover{color:var(--ink);border-color:#b6c5bf}.guide-card h2,.guide-card h3{color:var(--green);margin:8px 0;font-family:Georgia,serif;font-size:1.45rem}.guide-card p{color:var(--muted);margin-bottom:0}.section-tight{border-bottom:1px solid var(--line);background:var(--surface);padding:18px 0}.hsk30-secondary-nav-wrap{z-index:19;border-top:1px solid var(--line);backdrop-filter:blur(14px);background:#fffdf8f0;padding:10px 0;position:sticky;top:72px;box-shadow:0 8px 18px #103b3414}.level-tabs{flex-wrap:wrap;gap:8px;display:flex}.level-tab-menu{position:relative}.level-tab-trigger{border:1px solid var(--line);color:var(--green);cursor:pointer;font:inherit;background:0 0;border-radius:999px;align-items:center;gap:5px;padding:9px 13px;font-size:.84rem;font-weight:780;display:flex}.level-tab-trigger span{font-size:.8rem;transition:transform .16s}.level-tab-menu:hover>.level-tab-trigger,.level-tab-menu:focus-within>.level-tab-trigger,.level-tab-trigger[aria-current=page]{border-color:var(--green);background:var(--green);color:#fff}.level-tab-menu:hover>.level-tab-trigger,.level-tab-menu:focus-within>.level-tab-trigger{animation:1.2s ease-in-out infinite level-tab-breathe}.level-tab-menu:hover>.level-tab-trigger span,.level-tab-menu:focus-within>.level-tab-trigger span{transform:rotate(180deg)}.level-tab-dropdown{z-index:20;border:1px solid var(--line);background:var(--paper);opacity:0;visibility:hidden;border-radius:14px;gap:2px;min-width:166px;padding:18px 10px 10px;transition:opacity .16s .5s,transform .16s .5s,visibility 0s linear .66s;display:grid;position:absolute;top:100%;left:0;transform:translateY(-4px);box-shadow:0 16px 35px #103b3424}.level-tab-menu:hover>.level-tab-dropdown,.level-tab-menu:focus-within>.level-tab-dropdown{opacity:1;visibility:visible;transition-delay:0s;transform:translateY(0)}.level-tabs:has(.level-tab-menu:hover) .level-tab-menu:not(:hover)>.level-tab-dropdown{opacity:0;visibility:hidden;transition-delay:0s;transform:translateY(-4px)}@keyframes level-tab-breathe{50%{transform:translateY(-1px);box-shadow:0 0 0 5px #173f3a1a,0 6px 14px #103b3429}}.level-tab-dropdown a{color:var(--green);border-radius:8px;padding:8px;font-size:.87rem;font-weight:720;text-decoration:none}.level-tab-dropdown a:hover,.level-tab-dropdown a[aria-current=page]{background:var(--green-soft);color:var(--green)}.timeline-list{gap:12px;margin:22px 0;display:grid}.timeline-list article{border:1px solid var(--line);background:var(--surface);border-radius:15px;grid-template-columns:minmax(110px,.32fr) 1fr;gap:20px;padding:18px 20px;display:grid}.timeline-list strong{color:var(--green)}.timeline-list p{margin:0}.vocabulary-intro{margin-bottom:24px}.button-row{flex-wrap:wrap;gap:10px;margin:24px 0;display:flex}.feature-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin:24px 0;display:grid}.feature-card{border:1px solid var(--line);background:var(--surface);border-radius:16px;padding:20px}.content-section .feature-card h3{margin:0 0 8px}.feature-card p{margin:0}.article-layout{grid-template-columns:minmax(0,820px) 300px;align-items:start;gap:52px;display:grid}.article-body{max-width:none}.article-body>h2:first-of-type{margin-top:32px}.article-toc{position:sticky;top:96px}.grammar-point{border-bottom:1px solid var(--line);margin:0 0 42px;padding-bottom:38px}.grammar-practice{background:var(--cream);border-radius:14px;margin-top:18px;padding:18px}.reading-list{gap:34px;display:grid}.reading-card{border:1px solid var(--line);background:var(--surface);border-radius:22px;padding:clamp(22px,4vw,42px);box-shadow:0 14px 36px #173f3a12}.reading-heading{justify-content:space-between;align-items:flex-start;gap:22px;display:flex}.reading-heading h2{margin-top:8px}.reading-chinese{color:var(--ink);margin:24px 0 12px;font-size:clamp(1.16rem,2.3vw,1.36rem);line-height:2}.reading-pinyin{background:var(--cream);color:var(--green);border-radius:14px;padding:16px 18px;line-height:1.9}.reading-translation{border:1px solid var(--line);border-radius:14px;margin:18px 0 28px;padding:14px 18px}.reading-translation summary{cursor:pointer;font-weight:760}.reading-questions fieldset{border:1px solid var(--line);border-radius:14px;margin:0 0 20px;padding:18px}.reading-questions legend{padding:0 8px;font-weight:780}.reading-questions label{cursor:pointer;border-radius:10px;gap:10px;margin:8px 0;padding:10px 12px;display:flex}.reading-questions label:hover{background:var(--cream)}.reading-questions label[data-correct]{color:#1f624f;background:#e7f5ee}.reading-questions label[data-wrong]{color:#8d4035;background:#fff0ed}.question-explanation{color:var(--muted);margin:12px 0 0}.reading-score{min-height:28px;color:var(--green);font-weight:780}.reading-next{text-align:right;margin-top:22px;font-weight:760}.mock-intro{grid-template-columns:minmax(0,1fr) 300px;align-items:start;gap:32px;display:grid}.mock-controls{border:2px solid var(--green);background:linear-gradient(180deg, #f0f7f5 0%, var(--surface) 100%);text-align:center;border-radius:22px;align-self:start;padding:28px;position:sticky;top:96px;box-shadow:0 12px 40px #173f3a1f}.mock-controls h2{color:var(--green);margin:0 0 20px;font-family:Georgia,serif;font-size:1.5rem}.mock-stats{justify-content:center;gap:24px;margin-bottom:24px;display:flex}.mock-stat{flex-direction:column;align-items:center;display:flex}.mock-stat-number{color:var(--green);font-size:2rem;font-weight:820;line-height:1}.mock-stat-label{color:var(--muted);text-transform:uppercase;letter-spacing:.04em;margin-top:4px;font-size:.78rem}.mock-start-btn{background:var(--green);color:#fff;cursor:pointer;border:0;border-radius:16px;justify-content:center;align-items:center;gap:10px;width:100%;min-height:56px;padding:0 24px;font-size:1.1rem;font-weight:780;transition:transform .15s,box-shadow .15s;display:inline-flex;box-shadow:0 8px 24px #173f3a38}.mock-start-btn:hover{background:var(--green-2);transform:translateY(-2px);box-shadow:0 12px 32px #173f3a47}.mock-start-btn:active{transform:translateY(0)}.mock-start-icon{font-size:1.2rem}.mock-hint{color:var(--muted);margin:12px 0 0;font-size:.8rem}.mock-level-switch{border-top:1px solid var(--line);margin-top:20px;padding-top:18px}.mock-level-label{color:var(--muted);text-transform:uppercase;letter-spacing:.04em;margin-bottom:10px;font-size:.78rem;display:block}.mock-level-btns{justify-content:center;gap:6px;display:flex}.mock-level-btn{border:1px solid var(--line);width:40px;height:40px;color:var(--ink);background:#fff;border-radius:10px;justify-content:center;align-items:center;font-size:.9rem;font-weight:750;text-decoration:none;transition:all .15s;display:inline-flex}.mock-level-btn:hover{border-color:var(--green);background:var(--mist);color:var(--green)}.mock-level-btn.is-current{background:var(--green);color:#fff;border-color:var(--green);pointer-events:none}.mock-timer{color:var(--green);font-variant-numeric:tabular-nums;margin:18px 0 0;font-size:2rem;font-weight:820}.mock-test{margin-top:46px}.mock-section{margin:0 0 48px}.mock-section-heading{border-bottom:2px solid var(--green);justify-content:space-between;align-items:end;gap:24px;padding-bottom:16px;display:flex}.mock-part{margin:28px 0}.mock-part h3 small{color:var(--muted);font-weight:600}.mock-question{border:1px solid var(--line);border-radius:14px;margin:0 0 18px;padding:18px}.mock-question legend{padding:0 8px;font-weight:780}.mock-question label{cursor:pointer;border-radius:10px;gap:10px;margin:8px 0;padding:10px 12px;display:flex}.mock-question label:hover{background:var(--cream)}.mock-question label[data-correct]{color:#1f624f;background:#e7f5ee}.mock-question label[data-wrong]{color:#8d4035;background:#fff0ed}.mock-question textarea{border:1px solid var(--line);width:100%;font:inherit;border-radius:12px;padding:14px;line-height:1.6}.mock-audio{color:var(--muted);align-items:center;gap:10px;margin:12px 0;display:flex}.mock-reference{background:var(--cream);color:var(--muted);border-radius:10px;margin:12px 0 0;padding:12px 14px}.mock-submit,.mock-results{border:1px solid var(--line);background:var(--surface);border-radius:20px;margin:32px 0;padding:clamp(22px,4vw,38px)}.sentence-list{gap:12px;display:grid}.sentence-card{border:1px solid var(--line);background:var(--surface);border-radius:14px;padding:18px 20px}.sentence-card p{margin:7px 0}.sentence-meta{color:var(--muted);font-size:.9rem}.flashcard-shell{border:1px solid var(--line);background:var(--cream);border-radius:22px;gap:20px;margin-top:46px;padding:clamp(24px,5vw,42px);display:grid}.flashcard{border:1px solid var(--line);background:var(--surface);min-height:250px;color:var(--ink);cursor:pointer;border-radius:20px;padding:30px;box-shadow:0 14px 36px #173f3a14}.flashcard-front,.flashcard-back{place-items:center;gap:12px;display:grid}.flashcard-front strong{color:var(--green);font-family:Georgia,Noto Serif CJK SC,serif;font-size:clamp(2.6rem,8vw,5rem)}.flashcard-back strong{color:var(--green);font-size:1.5rem}.flashcard-back span{max-width:580px;font-size:1.08rem}.flashcard-actions{flex-wrap:wrap;justify-content:center;gap:10px;display:flex}.flashcard-progress{text-align:center;color:var(--muted);font-weight:720}.grammar-pattern{background:var(--green-soft);border-radius:9px;margin:0 0 14px;padding:8px 12px;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-weight:780;display:inline-flex;color:var(--green)!important}.example-card{border:1px solid var(--line);background:var(--surface);border-radius:15px;margin:18px 0;padding:18px 20px}.character-link-grid{flex-wrap:wrap;gap:10px;display:flex}.character-link-grid span{border:1px solid var(--line);background:var(--surface);width:58px;height:58px;color:var(--green);border-radius:14px;place-items:center;font-family:Georgia,Noto Serif CJK SC,serif;font-size:1.8rem;display:grid}.related-word-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;display:grid}.related-word-grid a{border:1px solid var(--line);background:var(--surface);border-radius:14px;gap:3px;padding:15px 17px;text-decoration:none;display:grid}.related-word-grid strong{color:var(--green);font-family:Georgia,Noto Serif CJK SC,serif;font-size:1.25rem}.related-word-grid span,.related-word-grid small{color:var(--muted)}.quiz-shell{max-width:780px}.quiz-progress{color:var(--muted);justify-content:space-between;gap:20px;margin-bottom:12px;font-size:.88rem;font-weight:760;display:flex}.quiz-card,.quiz-results{border:1px solid var(--line);background:var(--surface);border-radius:22px;padding:clamp(24px,5vw,44px);box-shadow:0 14px 36px #173f3a14}.quiz-card h2{color:var(--green);margin:12px 0 4px;font-size:clamp(2rem,6vw,3.4rem)}.quiz-options{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:26px 0 18px;display:grid}.quiz-options button{border:1px solid var(--line);min-height:58px;color:var(--ink);font:inherit;cursor:pointer;background:#fff;border-radius:13px;padding:12px 15px;font-weight:720}.quiz-options button:hover:not(:disabled){border-color:var(--green)}.quiz-options button[data-correct=true]{color:#1f624f;background:#e7f5ee;border-color:#3f886e}.quiz-options button[data-wrong=true]{color:#8d4035;background:#fff0ed;border-color:#c97568}.quiz-feedback{min-height:28px;color:var(--muted)}.result-score{color:var(--coral);font-family:Georgia,serif;font-size:3rem;font-weight:800}.compare-controls{background:var(--green);color:#fff;border-radius:18px;grid-template-columns:repeat(5,minmax(0,1fr)) auto;align-items:end;gap:12px;padding:22px;display:grid}.compare-controls label{gap:7px;font-size:.82rem;font-weight:780;display:grid}.compare-controls select{min-height:46px;color:var(--ink);background:#fff;border:0;border-radius:10px;padding:0 12px}.compare-controls .button{white-space:nowrap;min-height:46px}.compare-metrics{margin:24px 0}.compare-metrics>article{border:1px solid var(--line);background:var(--surface);border-radius:16px;flex-direction:column;min-height:150px;padding:20px;display:flex}.compare-metrics strong{color:var(--green);font-family:Georgia,serif;font-size:2rem}.compare-filter{grid-template-columns:1fr auto;align-items:end}.comparison-result-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;display:grid}.comparison-result-grid>section{border:1px solid var(--line);background:var(--surface);border-radius:16px;min-width:0;padding:20px}.comparison-result-grid h2{margin-top:0;font-size:1.3rem}.comparison-result-grid ul{max-height:560px;margin:0;padding:0;list-style:none;overflow-y:auto}.comparison-result-grid li{border-bottom:1px solid var(--line);padding:9px 0}.comparison-result-grid li:last-child{border-bottom:0}.comparison-result-grid a{text-decoration:none}.compare-method{margin-top:48px}.site-footer{color:#ffffffc2;background:#112f2b;margin-top:70px;padding:54px 0 24px}.footer-grid{grid-template-columns:1.5fr 1fr 1fr;gap:48px;display:grid}.brand-footer{color:#fff}.site-footer h2{color:#fff;text-transform:uppercase;letter-spacing:.08em;margin:4px 0 12px;font-size:.9rem}.site-footer a:not(.brand){color:#ffffffc2;padding:5px 0;text-decoration:none;display:block}.site-footer a:hover{color:#fff}.footer-bottom{border-top:1px solid #ffffff21;justify-content:space-between;gap:24px;margin-top:44px;padding-top:20px;font-size:.8rem;display:flex}@media (width<=900px){.primary-nav{display:none}.mobile-menu{display:block}.search-link{margin-left:0}.hero{padding-top:58px}.hero-grid,.split-layout,.article-layout{grid-template-columns:1fr}.hero-panel{min-height:320px}.version-grid,.resource-grid,.guide-list{grid-template-columns:1fr}.course-grid,.lesson-vocabulary-grid,.grammar-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.side-card{position:static}.comparison-nav{display:none}.footer-grid{grid-template-columns:1fr 1fr}.footer-grid>:first-child{grid-column:1/-1}.asset-metrics{grid-template-columns:repeat(2,minmax(0,1fr))}.article-toc{position:static}.feature-grid,.comparison-result-grid{grid-template-columns:1fr}.compare-controls{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (width<=600px){:root{--shell:min(100% - 28px, 1180px)}.header-inner{min-height:64px}.hsk30-secondary-nav-wrap{top:64px}.search-link span{display:none}.hero{padding:42px 0 52px}.hero h1,.page-hero h1{font-size:2.8rem}.hero-grid{gap:38px}.hero-panel{min-height:260px;padding:20px}.character-main{font-size:8rem}.character-note{font-size:.78rem}.section{padding:54px 0}.answer-card{padding:22px}.fact-grid,.asset-metrics,.database-gateway{grid-template-columns:1fr}.asset-metrics>a{min-height:180px}.asset-method-link{text-align:left}.author-profile-heading,.author-card{grid-template-columns:1fr}.author-avatar-profile{width:86px;height:86px;font-size:2.2rem}.section-heading{display:block}.section-heading p{margin-top:12px}.course-grid,.lesson-grid,.lesson-vocabulary-grid,.grammar-grid{grid-template-columns:1fr}.lesson-heading-row{display:block}.course-card{min-height:280px}.status-note,.word-hero-grid{grid-template-columns:1fr}.membership-panel{justify-content:start}.footer-grid{grid-template-columns:1fr}.footer-grid>:first-child{grid-column:auto}.footer-bottom{display:grid}.timeline-list article{grid-template-columns:1fr;gap:6px}.related-word-grid,.quiz-options,.compare-controls,.mock-intro{grid-template-columns:1fr}.mock-controls{margin-top:16px;position:static}.reading-heading,.mock-section-heading{flex-direction:column;align-items:flex-start}.compare-filter{grid-template-columns:1fr}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}