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:root{--background:#F1F3F1;--paper:#FBFCFA;--surface:#fff;--surface-soft:#E9EEEB;--pine:#234B43;--pine-deep:#17372F;--pine-light:#38685C;--electric:#36AFA5;--electric-deep:#237E78;--electric-soft:#DFF3F0;--amber:#C88A45;--amber-deep:#A66C2D;--amber-soft:#F7EDDF;--silver:#AAB5B3;--silver-soft:#E4E9E6;--ice:#DDEBF0;--ice-deep:#608A9B;--graphite:#252E30;--graphite-deep:#151D20;--title:#273432;--body:#485651;--muted:#75817C;--border:#DCE4DF;--divider:#E9EEEA;--player-bg:#080D0E;--player-text:#F8FAF9;--max:1320px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--background);color:var(--title);font-family:Inter,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.7}a{color:inherit;text-decoration:none}button,input,select{font:inherit}.wrap{max-width:var(--max);margin:auto;padding:0 30px}.topbar{height:78px;padding:0 max(30px,calc((100vw - var(--max))/2));display:flex;align-items:center;gap:34px;background:rgba(251,252,250,.96);border-bottom:1px solid 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3px;border-bottom:1px solid var(--border)}.intro-ribbon span{font-size:13px;color:var(--muted)}.intro-ribbon b{font-size:18px;color:var(--pine)}.intro-ribbon p{margin-left:auto;font-size:12px;color:var(--muted)}.section{margin:76px 0}.section-head{display:flex;align-items:end;justify-content:space-between;margin-bottom:27px;gap:20px}.section-head h2{font-size:31px;line-height:1.25;margin:8px 0}.section-head p{font-size:13px;color:var(--muted);margin:0}.more{font-size:12px;color:var(--pine);font-weight:700;white-space:nowrap}.channel-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:13px}.channel-card{background:var(--paper);border:1px solid var(--border);padding:23px 22px 20px;min-height:220px;position:relative;overflow:hidden;transition:.2s}.channel-card:hover{border-color:var(--electric);transform:translateY(-4px);box-shadow:0 15px 30px #234b4310}.channel-no{font-size:9px;letter-spacing:1.4px;color:var(--muted)}.channel-card 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auto}.article-meta{display:flex;justify-content:center;gap:25px;color:var(--muted);font-size:10px;margin-top:20px}.article-hero{height:360px;max-width:950px;margin:0 auto 42px;position:relative;background:var(--surface-soft);overflow:hidden}.article-hero img{width:100%;height:100%;object-fit:cover}.article-hero>span{position:absolute;bottom:15px;left:18px;color:white;font-size:9px;letter-spacing:1px;text-shadow:0 1px 5px #000}.article-layout{max-width:950px;margin:auto;display:grid;grid-template-columns:220px 1fr;gap:55px}.article-layout aside{height:max-content;position:sticky;top:105px;background:var(--surface);border:1px solid var(--border);padding:20px}.article-layout aside>b{font-size:13px}.article-layout aside p{font-size:11px;color:var(--muted)}.article-layout aside span{display:block;font-size:9px;color:var(--muted);margin-top:20px}.article-layout aside strong{font-size:20px;color:var(--pine)}.article-layout aside a{display:block;margin-top:18px;font-size:10px;color:var(--electric-deep)}.article-body p{font-size:15px;line-height:2.15;color:#43504B;margin:0 0 23px}.article-body blockquote{border-left:3px solid var(--amber);background:var(--amber-soft);padding:17px 20px;margin:27px 0;font-size:15px;color:var(--pine);font-weight:700}.article-conclusion{margin:35px 0;padding:25px;background:var(--pine);color:white}.article-conclusion .eyebrow{color:#A9DED5}.article-conclusion h2{margin:6px 0;font-size:21px}.article-conclusion p{color:#E0EBE6;margin:0;font-size:13px}.source-note{border-top:1px solid var(--border);padding-top:17px;color:var(--muted)!important;font-size:10px!important}.related-block{max-width:950px;margin:65px auto}.related-block h2{font-size:23px;margin:6px 0 22px}.related-block .story-grid{grid-template-columns:repeat(2,1fr)}.topics-banner{padding:65px 7%;background:linear-gradient(120deg,#17372F,#234B43 65%,#237E78)}.topics-banner h1{font-size:53px;line-height:1.3;margin:12px 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a{font-size:10px;color:var(--pine);font-weight:700}.topic-visual{height:245px;background:var(--surface-soft);position:relative;overflow:hidden;display:grid;place-content:center;text-align:center;color:var(--pine);font-size:25px;font-weight:900;line-height:1.1}.topic-visual img{width:100%;height:100%;object-fit:cover}.topic-visual span{position:absolute;bottom:10px;left:12px;font-size:8px;font-weight:400}.tone-amber .topic-number b{color:var(--amber-deep)}.tone-ice .topic-number b{color:var(--ice-deep)}.tone-teal .topic-number b{color:var(--electric-deep)}.about-hero{margin:32px 0 60px;padding:65px 7%;background:var(--pine-deep);color:white;position:relative;overflow:hidden}.about-hero:after{content:"17C";position:absolute;right:6%;top:-50px;font-size:230px;color:#ffffff0a;font-weight:900}.about-hero .eyebrow{color:#A9DED5}.about-hero h1{font-size:55px;line-height:1.3;margin:14px 0}.about-hero p{max-width:620px;color:#D0DED8;font-size:14px}.about-mark{margin-top:36px;border-top:1px solid #ffffff55;padding-top:16px;font-size:25px;font-weight:900;letter-spacing:4px}.about-mark small{font-size:9px;font-weight:400;letter-spacing:2px;margin-left:14px}.about-principles{display:grid;grid-template-columns:.8fr 1.2fr;gap:9%;padding:0 5% 65px}.principle-intro h2{font-size:32px;line-height:1.4}.principle-intro p{font-size:12px;color:var(--muted)}.principle-list article{display:grid;grid-template-columns:45px 1fr;gap:18px;padding:17px 0;border-bottom:1px solid var(--border)}.principle-list article>b{font-size:21px;color:var(--electric-deep)}.principle-list h3{margin:0;font-size:15px}.principle-list p{margin:5px 0 0;font-size:11px;color:var(--muted)}.about-boundary{background:var(--surface);padding:40px 5%;margin-bottom:55px}.about-boundary h2{font-size:28px;line-height:1.4}.boundary-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:25px;margin-top:28px}.boundary-grid article{border-top:2px solid var(--electric);padding-top:13px}.boundary-grid h3{font-size:14px}.boundary-grid p{font-size:11px;color:var(--muted)}.about-end{display:flex;justify-content:space-between;align-items:center;padding:25px 5% 65px}.about-end h2{font-size:29px;line-height:1.35}.notfound{min-height:480px;display:flex;flex-direction:column;justify-content:center;align-items:flex-start;max-width:700px;margin:auto}.notfound>span{font-size:10px;color:var(--electric-deep);letter-spacing:2px}.notfound h1{font-size:42px}.notfound p{color:var(--muted);font-size:13px}.notfound .btn{margin-top:15px}
@media(max-width:1050px){.topbar{gap:18px}.topbar nav{gap:15px}.top-search{width:170px}.hero{grid-template-columns:1fr .8fr}.channel-grid{grid-template-columns:repeat(2,1fr)}.story-grid{grid-template-columns:repeat(2,1fr)}.topic-row{grid-template-columns:70px 1fr 220px;gap:18px}.directory-layout{grid-template-columns:220px 1fr}}
@media(max-width:760px){.wrap{padding:0 16px}.topbar{height:65px;padding:0 16px;gap:10px}.brand{min-width:0;flex:1}.brand-symbol{width:37px;height:37px}.brand b{font-size:16px}.topbar nav,.top-search{display:none}.menu-btn{display:block;border:0;background:var(--pine);color:white;border-radius:8px;width:38px;height:38px}.mobile-panel{display:flex;position:fixed;z-index:60;inset:0;background:var(--pine-deep);color:white;flex-direction:column;padding:90px 35px;gap:24px}.mobile-panel[hidden]{display:none}.mobile-panel a{font-size:23px}.mobile-close{position:absolute;right:20px;top:18px;border:0;background:none;color:white;font-size:32px}.hero{margin-top:14px;grid-template-columns:1fr;min-height:0}.hero-text{padding:36px 25px 25px}.hero-overline{margin-top:26px}.hero h1{font-size:46px}.hero-desc{font-size:13px}.hero-foot{gap:22px;margin-top:30px}.hero-foot span{font-size:18px}.hero-visual{min-height:290px}.hero-image-box{height:225px;width:58%}.hero-orbit{width:260px;height:260px}.orbit-b{width:310px;height:310px}.hero-note{right:5%;top:12%}.hero-seal{right:14%;bottom:8%;width:52px;height:52px}.intro-ribbon{display:block;padding:20px 2px}.intro-ribbon b{margin-left:10px;font-size:16px}.intro-ribbon p{margin:5px 0 0}.section{margin:52px 0}.section-head{align-items:start}.section-head h2{font-size:24px}.section-head p{font-size:11px;max-width:270px}.more{font-size:10px}.channel-grid{gap:8px}.channel-card{padding:15px;min-height:195px}.channel-card h3{font-size:16px;margin-top:18px}.channel-card p{font-size:10px}.channel-card>b{font-size:10px}.lead-grid{grid-template-columns:1fr}.lead-main .story-image{height:220px}.lead-side{grid-template-columns:1fr 1fr;gap:8px}.lead-side .story-card{display:block}.lead-side .story-image{height:115px}.lead-side .story-copy{padding:10px}.lead-side .story-copy h3{font-size:12px}.lead-side .story-copy p{display:none}.lead-side .story-meta{font-size:8px}.method-band{grid-template-columns:1fr;padding:27px 22px;gap:20px}.method-title h2{font-size:27px}.method-steps{gap:9px}.method-steps article{padding-left:9px}.method-steps h3{font-size:12px}.method-steps p{font-size:9px}.mosaic{grid-template-columns:1fr;grid-template-rows:220px 170px 170px}.mosaic-large{grid-row:auto}.mosaic h3{font-size:21px}.story-grid{grid-template-columns:1fr 1fr;gap:9px}.story-image{height:125px}.story-copy{padding:10px}.story-copy h3{font-size:12px}.story-copy p{font-size:9px}.story-meta{font-size:8px}.topic-callout{grid-template-columns:1fr;padding:25px;gap:20px}.topic-callout h2{font-size:29px}.topic-art{height:190px}.closing{padding:35px 15px}.closing h2{font-size:30px}.footer{padding:28px 17px 25px;grid-template-columns:1fr}.foot-links{flex-wrap:wrap;gap:15px}.page-banner{margin:15px 0 25px;padding:35px 23px}.page-banner h1,.guide-banner h1,.topics-banner h1,.about-hero h1{font-size:38px}.page-banner p{font-size:12px}.banner-stats{gap:25px}.banner-stats b{font-size:21px}.directory-layout{grid-template-columns:1fr;gap:14px}.directory-side{padding:14px}.directory-side h2{font-size:16px}.directory-link{display:inline-flex;border:1px solid var(--border);padding:7px 9px;margin:3px;font-size:10px}.side-tip{display:none}.filter-bar{flex-wrap:wrap}.filter-bar input{flex-basis:100%;height:42px}.filter-bar select{width:auto;flex:1}.filter-bar .btn{padding:9px}.directory-heading h2{font-size:21px}.directory-heading small{font-size:9px}.channel-detail-grid{gap:8px}.channel-detail{padding:13px}.channel-detail h3{font-size:16px}.channel-detail p{font-size:9px}.channel-detail>b{font-size:9px}.channel-detail em{font-size:9px}.reading-intro{grid-template-columns:1fr;gap:5px}.reading-intro h2{font-size:22px}.reading-grid{grid-template-columns:1fr 1fr;gap:9px}.article-heading{margin:25px 0}.article-heading h1{font-size:29px}.article-lead{font-size:13px}.article-meta{gap:12px}.article-hero{height:220px;margin-bottom:25px}.article-layout{grid-template-columns:1fr;gap:18px}.article-layout aside{position:static}.article-body p{font-size:13px}.related-block .story-grid{grid-template-columns:1fr 1fr}.topic-row{grid-template-columns:48px 1fr;gap:12px;padding:25px 0}.topic-number b{font-size:27px}.topic-content h2{font-size:21px}.topic-content h3{font-size:12px}.topic-steps{grid-template-columns:1fr}.topic-visual{grid-column:2;height:160px}.about-hero{margin:15px 0 35px;padding:38px 24px}.about-hero p{font-size:12px}.about-principles{grid-template-columns:1fr;gap:20px;padding:0 3% 40px}.principle-intro h2{font-size:27px}.about-boundary{padding:25px 20px}.about-boundary h2{font-size:23px}.boundary-grid{grid-template-columns:1fr;gap:10px}.about-end{padding:10px 3% 45px;align-items:start;gap:15px;flex-direction:column}.about-end h2{font-size:25px}.notfound{min-height:420px;padding:20px}.notfound h1{font-size:30px}}
@media(max-width:380px){.hero h1{font-size:40px}.channel-card{min-height:210px}.story-grid,.reading-grid{grid-template-columns:1fr}.story-image{height:170px}.lead-side .story-image{height:100px}.banner-stats{gap:17px}}