:root{--ink:#20335f;--muted:#68758f;--blue:#526cf2;--blue-dark:#344dc8;--mint:#67d8b9;--paper:#fffdf8;--soft:#f2f4ff;--line:#dfe5f3;--gold:#ffbd3d;--max:1120px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei",system-ui,sans-serif;line-height:1.75}a{color:inherit}.wrap{width:min(var(--max),calc(100% - 36px));margin:auto}.topbar{position:sticky;top:0;z-index:20;background:#fffdf8ef;border-bottom:1px solid #edf0f6;backdrop-filter:blur(14px)}.nav{height:72px;display:flex;align-items:center;gap:24px}.brand{display:flex;align-items:center;gap:11px;text-decoration:none;font-weight:900}.brand-mark{display:grid;place-items:center;width:42px;height:42px;border-radius:13px;background:var(--blue);color:#fff;font-size:22px;box-shadow:0 5px 0 var(--blue-dark)}.brand small{display:block;color:#8691aa;font-size:8px;letter-spacing:1.8px;line-height:1.2}.nav-links{display:flex;gap:22px;margin-left:auto;font-size:14px}.nav-links a{text-decoration:none}.tool-link,.button{display:inline-flex;align-items:center;justify-content:center;border-radius:12px;padding:11px 17px;background:var(--blue);color:#fff;text-decoration:none;font-weight:800;box-shadow:0 4px 0 var(--blue-dark)}.hero{padding:74px 0 54px;background:linear-gradient(135deg,#f0f3ff 0%,#fff8ef 100%)}.hero-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:46px;align-items:center}.eyebrow{color:var(--blue);font-size:13px;font-weight:900;letter-spacing:1px}.hero h1{margin:13px 0 18px;font-size:clamp(40px,6vw,68px);line-height:1.08;letter-spacing:-3px}.hero h1 span{color:var(--blue);position:relative}.hero p{max-width:680px;margin:0;color:var(--muted);font-size:18px}.hero-actions{display:flex;gap:12px;margin-top:28px}.button.secondary{background:#fff;color:var(--ink);border:1px solid var(--line);box-shadow:none}.hero-board{padding:27px;border-radius:27px;background:#293e70;color:#fff;box-shadow:0 9px 0 #17274e}.hero-board h2{margin:5px 0 8px;font-size:25px}.hero-board p{font-size:13px;color:#cbd5ee}.hero-board ul{display:grid;gap:10px;margin:22px 0 0;padding:0;list-style:none}.hero-board li{padding:11px 13px;border-radius:12px;background:#ffffff12;font-size:13px}.section{padding:64px 0}.section.soft{background:#f5f7ff}.section-head{display:flex;align-items:end;gap:20px;margin-bottom:28px}.section-head h2{margin:0;font-size:32px}.section-head p{margin:0 0 3px;color:var(--muted)}.section-head a{margin-left:auto;color:var(--blue);font-size:13px}.topic-grid,.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.topic-card,.article-card{border:1px solid var(--line);border-radius:19px;background:#fff;padding:22px;text-decoration:none;box-shadow:0 5px 0 #e8ebf3}.topic-card span{font-size:28px}.topic-card h3,.article-card h3{margin:9px 0 7px;line-height:1.4}.topic-card p,.article-card p{margin:0;color:var(--muted);font-size:13px}.article-card{display:flex;min-height:220px;flex-direction:column}.article-card .tag,.tag{align-self:flex-start;padding:4px 8px;border-radius:7px;background:#edf0ff;color:var(--blue);font-size:10px;font-weight:900}.article-card footer{display:flex;justify-content:space-between;margin-top:auto;padding-top:20px;color:#8791a5;font-size:11px}.search-box{display:flex;gap:9px;margin:0 0 24px}.search-box input{width:100%;border:1.5px solid var(--line);border-radius:13px;background:#fff;padding:13px 15px;font:inherit;outline:none}.search-box input:focus{border-color:var(--blue);box-shadow:0 0 0 4px #526cf214}.path{display:grid;grid-template-columns:repeat(4,1fr);gap:11px}.path div{padding:18px;border-radius:16px;background:#fff;border:1px solid var(--line)}.path b{display:block;margin-bottom:6px}.path span{color:var(--muted);font-size:12px}.site-footer{padding:35px 0;border-top:1px solid var(--line);color:var(--muted);font-size:12px}.footer-row{display:flex;gap:22px;align-items:center}.footer-row strong{color:var(--ink);font-size:16px}.footer-row nav{display:flex;gap:16px;margin-left:auto}.footer-row a{color:var(--blue)}
.article-hero{padding:54px 0 34px;background:linear-gradient(135deg,#f0f3ff,#fffaf3)}.breadcrumbs{font-size:12px;color:var(--muted)}.article-hero h1{max-width:850px;margin:16px 0 13px;font-size:clamp(34px,5vw,52px);line-height:1.2}.article-hero .lead{max-width:800px;color:var(--muted);font-size:17px}.meta{display:flex;gap:13px;margin-top:20px;color:#8490a8;font-size:12px}.article-layout{display:grid;grid-template-columns:minmax(0,760px) 280px;gap:48px;padding:48px 0 70px}.prose h2{margin:42px 0 12px;font-size:27px;line-height:1.35}.prose h3{margin:28px 0 8px}.prose p,.prose li{color:#38496e}.prose blockquote{margin:24px 0;padding:16px 19px;border-left:4px solid var(--mint);border-radius:0 12px 12px 0;background:#effaf7}.word-table{width:100%;border-collapse:separate;border-spacing:0;margin:20px 0;border:1px solid var(--line);border-radius:15px;overflow:hidden;font-size:14px}.word-table th,.word-table td{padding:12px;border-bottom:1px solid var(--line);text-align:left}.word-table tr:last-child td{border:0}.word-table th{background:#f2f4ff}.exercise{padding:20px;border-radius:16px;background:#f7f8fc;border:1px solid var(--line)}.aside-card{position:sticky;top:95px;padding:20px;border-radius:18px;background:#293e70;color:#fff}.aside-card h3{margin-top:0}.aside-card p{color:#cbd5ee;font-size:12px}.aside-card a{display:flex;margin-top:10px;border-radius:10px;padding:10px 12px;background:#fff;color:var(--ink);text-decoration:none;font-size:12px;font-weight:800}.source-note{margin-top:40px;padding-top:20px;border-top:1px solid var(--line);color:#7b879e;font-size:12px}
@media(max-width:820px){.hero-grid,.article-layout{grid-template-columns:1fr}.hero-board{margin-top:5px}.topic-grid,.article-grid{grid-template-columns:repeat(2,1fr)}.path{grid-template-columns:1fr 1fr}.aside-card{position:static}.nav-links{display:none}}@media(max-width:560px){.wrap{width:min(100% - 26px,var(--max))}.nav{height:64px}.brand-mark{width:36px;height:36px}.tool-link{padding:9px 11px;font-size:12px}.hero{padding:48px 0 38px}.hero h1{letter-spacing:-2px}.hero p{font-size:15px}.hero-actions{display:grid;grid-template-columns:1fr 1fr}.topic-grid,.article-grid,.path{grid-template-columns:1fr}.section{padding:46px 0}.section-head{align-items:flex-start;flex-direction:column;gap:6px}.section-head a{margin-left:0}.footer-row{align-items:flex-start;flex-direction:column}.footer-row nav{margin-left:0;flex-wrap:wrap}.article-layout{padding-top:30px}.word-table{font-size:12px}.word-table th,.word-table td{padding:9px}}

/* 2026 portal visual system */
.brand-mark{position:relative;isolation:isolate;overflow:visible;border:1px solid #ffffff80;background:linear-gradient(145deg,#6e82ff,#3c55da);box-shadow:0 5px 0 #2d43b6,0 10px 26px #526cf235;transform:rotate(-4deg)}.brand-mark:before{content:"";position:absolute;inset:7px -7px;border:1px solid #86a8ff;border-radius:50%;transform:rotate(36deg);z-index:-1}.brand-mark i{position:absolute;width:5px;height:5px;border-radius:50%;background:var(--mint);right:-6px;top:10px;box-shadow:0 0 10px var(--mint)}
.portal-home{--ink:#172850;--blue:#536ff5;--blue-dark:#2e48c3;--soft:#f3f6ff}.portal-home .topbar{background:#fbfcffeb}.tech-hero{position:relative;overflow:hidden;padding:82px 0 72px;background:radial-gradient(circle at 78% 30%,#6578ff28,transparent 24%),radial-gradient(circle at 12% 85%,#5be0c31f,transparent 25%),linear-gradient(135deg,#f5f7ff,#fffaf5)}.tech-grid{position:absolute;inset:0;opacity:.55;background-image:linear-gradient(#536ff50c 1px,transparent 1px),linear-gradient(90deg,#536ff50c 1px,transparent 1px);background-size:42px 42px;mask-image:linear-gradient(to bottom,#000,transparent)}.tech-hero .hero-grid{position:relative;grid-template-columns:1.05fr .95fr;gap:64px}.live-dot{display:inline-block;width:8px;height:8px;margin-right:5px;border-radius:50%;background:#32c99c;box-shadow:0 0 0 5px #32c99c1d,0 0 14px #32c99c}.hero-copy h1{font-size:clamp(48px,7vw,82px);letter-spacing:-5px}.hero-copy h1 span{background:linear-gradient(90deg,#536ff5,#7e55e8);-webkit-background-clip:text;color:transparent}.trust-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;color:#677594;font-size:12px}.planet-console{position:relative;min-height:390px;border:1px solid #bfc9ff;border-radius:32px;background:linear-gradient(155deg,#233867,#17284e);box-shadow:0 18px 50px #273e7b28,0 8px 0 #102041;color:#fff;overflow:hidden}.planet-console:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,#ffffff08 1px,transparent 1px),linear-gradient(#ffffff08 1px,transparent 1px);background-size:32px 32px}.orbit-visual{position:relative;width:270px;height:270px;margin:28px auto 2px;border:1px solid #718aff;border-radius:50%;transform:rotate(-12deg)}.orbit-visual:before,.orbit-visual:after{content:"";position:absolute;inset:33px -28px;border:1px solid #4ce0bd8c;border-radius:50%;transform:rotate(55deg)}.orbit-visual:after{inset:62px -44px;border-color:#a98cff73;transform:rotate(-34deg)}.planet-core{position:absolute;z-index:2;inset:65px;display:grid;place-content:center;text-align:center;border-radius:50%;background:radial-gradient(circle at 35% 28%,#8291ff,#526cf2 48%,#344dc8);box-shadow:0 0 38px #6178ff99,inset -10px -14px 22px #243ba3}.planet-core b{font-size:62px;line-height:1}.planet-core small{font-size:8px;letter-spacing:2px}.orbit-node{position:absolute;z-index:3;display:grid;place-items:center;width:42px;height:42px;border-radius:13px;background:#fff;color:#253966;font-size:10px;font-weight:900;box-shadow:0 5px 18px #0b173a80}.node-a{top:12px;left:28px}.node-b{right:-2px;top:105px}.node-c{bottom:5px;left:46px}.console-data{position:relative;display:grid;grid-template-columns:repeat(3,1fr);margin:0 22px 22px;padding:15px;border-top:1px solid #ffffff1e;background:#ffffff08;border-radius:14px}.console-data span{display:grid;text-align:center;color:#b9c7e9;font-size:10px}.console-data b{color:#fff;font-size:20px}.channel-section{background:#fff}.channel-grid{display:grid;grid-template-columns:1.5fr repeat(2,1fr);gap:16px}.channel-card{position:relative;min-height:235px;padding:24px;border:1px solid var(--line);border-radius:22px;background:linear-gradient(145deg,#fff,#fafbff);text-decoration:none;box-shadow:0 6px 0 #e8ebf3;overflow:hidden}.channel-card.feature{grid-row:span 2;min-height:486px;padding:32px;background:linear-gradient(155deg,#536ff5,#354dc5);color:#fff;box-shadow:0 8px 0 #263aa2}.channel-card:after{content:"";position:absolute;width:120px;height:120px;right:-55px;bottom:-55px;border:1px solid #536ff52c;border-radius:50%;box-shadow:0 0 0 20px #536ff508,0 0 0 40px #536ff506}.channel-card.feature:after{width:230px;height:230px;right:-80px;bottom:-80px;border-color:#ffffff2e;box-shadow:0 0 0 35px #ffffff0a,0 0 0 70px #ffffff08}.channel-no{position:absolute;right:20px;top:15px;color:#9ba7c0;font:700 11px ui-monospace,monospace}.feature .channel-no{color:#d4dcff}.channel-icon{display:grid;place-items:center;width:48px;height:48px;border-radius:15px;background:#edf0ff;color:#536ff5;font-weight:900}.feature .channel-icon{width:66px;height:66px;background:#ffffff17;color:#fff;font-size:24px}.channel-card h3{margin:22px 0 8px;font-size:21px}.feature h3{margin-top:90px;font-size:34px}.channel-card p{color:var(--muted);font-size:13px}.feature p{max-width:360px;color:#dce3ff;font-size:15px}.channel-card b{position:absolute;left:24px;bottom:22px;color:#526cf2;font-size:12px}.feature b{left:32px;bottom:30px;color:#fff}.practice-band{background:#182b56;color:#fff}.practice-grid{display:grid;grid-template-columns:1fr 1.35fr auto;gap:30px;align-items:center}.practice-grid h2{margin:8px 0;font-size:31px}.practice-grid p{margin:0;color:#bac7e5;font-size:13px}.practice-band .path div{background:#ffffff0c;border-color:#ffffff16}.practice-band .path span{color:#aebcda}.practice-band .button{white-space:nowrap;background:#66d8b9;color:#153758;box-shadow:0 4px 0 #319e82}
@media(max-width:900px){.tech-hero .hero-grid,.practice-grid{grid-template-columns:1fr}.planet-console{min-height:360px}.channel-grid{grid-template-columns:1fr 1fr}.channel-card.feature{grid-row:auto;grid-column:1/-1;min-height:320px}.feature h3{margin-top:45px}}
@media(max-width:560px){.tech-hero{padding-top:54px}.hero-copy h1{letter-spacing:-3px}.planet-console{min-height:330px}.orbit-visual{width:230px;height:230px}.planet-core{inset:58px}.console-data{margin-top:8px}.channel-grid{grid-template-columns:1fr}.channel-card.feature{grid-column:auto}.trust-row{gap:8px}.practice-grid{gap:22px}}

/* Independent channel pages */
.channel-hero{padding:64px 0 52px;border-bottom:1px solid var(--line);background:linear-gradient(135deg,#f1f4ff,#fffaf2)}
.channel-hero h1{margin:12px 0 10px;font-size:clamp(42px,6vw,66px);line-height:1.08;letter-spacing:-3px}
.channel-hero p{max-width:760px;margin:0;color:var(--muted);font-size:17px}
.channel-hero .eyebrow{margin-top:22px}
.subnav{display:flex;flex-wrap:wrap;gap:10px;margin-top:25px}
.subnav a{padding:9px 14px;border:1px solid #cad3ee;border-radius:999px;background:#fff;color:var(--blue);font-size:12px;font-weight:800;text-decoration:none}
.english-hero{background:radial-gradient(circle at 85% 25%,#6f82ff24,transparent 25%),linear-gradient(135deg,#f1f4ff,#fff)}
.family-hero{background:radial-gradient(circle at 85% 25%,#67d8b930,transparent 24%),linear-gradient(135deg,#f1fff9,#fffaf2)}
.books-hero{background:radial-gradient(circle at 85% 25%,#b28cff29,transparent 24%),linear-gradient(135deg,#f8f2ff,#fffaf2)}
.travel-hero{background:radial-gradient(circle at 85% 25%,#ffbd3d2d,transparent 24%),linear-gradient(135deg,#fff8e8,#f5f8ff)}
.empty-note{display:none;margin-top:18px;padding:18px;border:1px dashed var(--line);border-radius:14px;color:var(--muted);text-align:center}
.article-grid:empty + .empty-note{display:block}
.nav-links a:hover,.subnav a:hover{color:var(--blue-dark)}
@media(max-width:560px){.channel-hero{padding:44px 0 38px}.channel-hero h1{letter-spacing:-2px}.channel-hero p{font-size:15px}}