/*
Theme Name: AI Education Lighthouse
Theme URI: https://example.org/
Author: Public AI Education Initiative
Description: 中国人工智能教育领航计划公益平台主题
Version: 1.2.0
Text Domain: ai-lighthouse
*/
:root{--navy:#06152f;--navy2:#0a214a;--blue:#1267ff;--cyan:#2bd7ff;--purple:#7756ff;--green:#18c98b;--ink:#0a1630;--muted:#64738e;--line:#dce6f5;--soft:#f4f8ff;--white:#fff;--shadow:0 20px 60px rgba(7,34,84,.12)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:"Inter","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;color:var(--ink);background:#fff;line-height:1.75;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}img{max-width:100%;height:auto}.container{width:min(1200px,calc(100% - 40px));margin:auto}.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(16px);border-bottom:1px solid rgba(12,50,105,.09)}.topline{height:4px;background:linear-gradient(90deg,var(--blue),var(--purple),var(--green))}.nav-wrap{height:82px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:12px;min-width:350px}.brand-mark{width:44px;height:44px;border-radius:14px;background:linear-gradient(145deg,var(--blue),var(--purple));display:grid;place-items:center;box-shadow:0 10px 25px rgba(18,103,255,.28)}.brand-mark svg{width:28px;height:28px}.brand-copy 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ul{padding-left:22px}.article-meta{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:30px}.back-link{display:inline-flex;color:var(--blue);font-weight:700;margin-bottom:30px}.challenge-media{background:linear-gradient(135deg,#061b3f,#7756ff 62%,#18c98b)!important}.info-card p,.prose p{color:var(--muted)}.prose{max-width:900px}.prose h2{font-size:32px;margin-top:45px}.contact-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:30px}.contact-card{padding:32px;border-radius:20px;background:var(--soft);border:1px solid var(--line)}.notice{padding:18px 20px;border-left:4px solid var(--green);background:#effcf7;color:#28664f;border-radius:0 12px 12px 0}
@media(max-width:1120px){.main-nav{position:fixed;inset:86px 20px auto;background:#fff;box-shadow:var(--shadow);border-radius:16px;padding:18px;display:none;flex-direction:column;align-items:stretch;gap:0}.main-nav.open{display:flex}.main-nav a{padding:12px}.main-nav a:after{display:none}.menu-toggle{display:block}.systems{grid-template-columns:repeat(2,1fr)}.partners{grid-template-columns:repeat(3,1fr)}.news-grid{grid-template-columns:1fr 1fr}.news-card:first-child{grid-column:1/-1}.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:720px){.container{width:min(100% - 28px,1200px)}.brand{min-width:0}.brand-copy strong{font-size:12px}.brand-copy small{display:none}.hero{min-height:auto;background-position:64% center}.hero-grid{padding:80px 0}.hero h1{font-size:clamp(27px,7.4vw,40px)}.hero p{font-size:16px}.hero-stats{grid-template-columns:1fr 1fr}.section{padding:70px 0}.section-head,.cta-inner{display:block}.section-head p{margin-top:15px}.mission-grid,.lab-grid,.contact-grid,.content-grid{grid-template-columns:1fr}.mission-visual{margin-top:20px}.systems,.impact,.news-grid{grid-template-columns:1fr}.news-card:first-child{grid-column:auto}.partners{grid-template-columns:1fr 1fr}.footer-grid{grid-template-columns:1fr}.footer-bottom{display:block}.mission-card:nth-child(2){transform:none}.cta-inner .btn{margin-top:20px}.nav-wrap{height:72px}}
@media(max-width:480px){.hero h1{font-size:25px;letter-spacing:-.055em}.hero h1 .hero-plan{white-space:nowrap}.brand-copy strong{font-size:11px}.brand-mark{width:39px;height:39px}.nav-wrap{gap:10px}}

/* v1.2 technology navigation, program cards, news imagery and protected reader */
.site-header .container{width:min(1380px,calc(100% - 32px))}.nav-wrap{height:88px}.main-nav{gap:7px;font-size:12px}.main-nav a.nav-item{display:flex;align-items:center;gap:5px;padding:9px 7px;border-radius:9px;white-space:nowrap;transition:.22s}.main-nav a.nav-item:after{display:none}.main-nav a.nav-item:hover{background:#eef4ff;color:#0b5cff;transform:translateY(-1px)}.nav-icon{width:20px;height:20px;border-radius:6px;display:grid;place-items:center;background:linear-gradient(145deg,#edf3ff,#eeeaff);color:#145fff;flex:0 0 auto}.nav-icon svg{width:12px;height:12px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}.nav-platform{color:#0a7e63!important;background:#ebfbf6!important;border:1px solid #bdeedc}.nav-platform .nav-icon{background:linear-gradient(145deg,#18c98b,#12aeee);color:#fff;box-shadow:0 5px 13px rgba(24,201,139,.24)}.nav-cta.nav-item{padding:10px 13px!important}.nav-cta .nav-icon{background:#ffffff20;color:#fff}.mission-visual{position:relative;gap:14px}.mission-card{position:relative;min-height:215px;padding:22px;border-color:#d8e5f8;background:linear-gradient(145deg,#fff,#f7faff);overflow:hidden;box-shadow:0 15px 38px rgba(8,40,90,.09);transition:.25s}.mission-card:nth-child(2){transform:none}.mission-card:hover{transform:translateY(-5px);box-shadow:0 22px 50px rgba(8,40,90,.14)}.mission-card:before{content:"";position:absolute;inset:0 0 auto;height:3px;background:var(--mission-accent,#1267ff)}.mission-card:after{content:"";position:absolute;width:120px;height:120px;border-radius:50%;right:-55px;bottom:-55px;background:var(--mission-glow,#1267ff12)}.mission-card-top{display:flex;justify-content:space-between;align-items:center}.mission-index{font-size:10px;font-weight:800;letter-spacing:.13em;color:#8092af}.mission-card .icon{margin:0;width:43px;height:43px;color:var(--mission-accent,#1267ff);background:var(--mission-glow,#edf4ff)}.mission-card .icon svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}.mission-card h3{font-size:20px;margin:25px 0 5px}.mission-line{display:block;width:38px;height:3px;border-radius:9px;background:var(--mission-accent,#1267ff);margin-top:18px}.mission-blue{--mission-accent:#1267ff;--mission-glow:#1267ff14}.mission-purple{--mission-accent:#7756ff;--mission-glow:#7756ff14}.mission-green{--mission-accent:#18a978;--mission-glow:#18c98b16}.mission-gold{--mission-accent:#e89a14;--mission-glow:#f0a21a18}.news-media:after{display:none}.news-media{background-size:cover!important;background-position:center!important}.news-media:before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 55%,rgba(4,17,38,.32))}.challenge-photo{background-image:url('assets/news/challenge-tech.webp')!important}.campus-photo{background-image:url('assets/news/campus-lab.webp')!important}.toolkit-photo{background-image:url('assets/news/teacher-toolkit.webp')!important}.cta-actions{display:flex;gap:12px;flex-wrap:wrap}.guide-hero{padding-bottom:65px}.guide-section{background:#eaf0f8;padding:32px 0 80px;user-select:none;-webkit-user-select:none}.reader-notice{position:sticky;top:92px;z-index:20;display:flex;justify-content:space-between;align-items:center;gap:20px;padding:17px 22px;margin-bottom:28px;border:1px solid #cbdaf0;border-radius:16px;background:rgba(255,255,255,.94);backdrop-filter:blur(16px);box-shadow:0 12px 35px rgba(8,32,75,.12)}.reader-notice strong{display:block;font-size:15px}.reader-notice span{display:block;color:#71809a;font-size:12px}.reader-jump{display:flex;align-items:center;gap:8px}.reader-jump a,.reader-jump>span{padding:7px 11px;border-radius:8px;background:#edf4ff;color:#1357c6!important;font-size:12px;font-weight:700}.guide-pages{display:grid;gap:30px;justify-items:center}.guide-page{margin:0;width:min(820px,100%);scroll-margin-top:170px}.guide-page.landscape{width:min(1080px,100%)}.page-protect{position:relative;overflow:hidden;background:#fff;border-radius:8px;box-shadow:0 14px 45px rgba(8,32,75,.15);border:1px solid #d6e0ef}.guide-page img{display:block;width:100%;height:auto;pointer-events:none}.learning-watermark{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%) rotate(-24deg);font-size:clamp(20px,3vw,38px);font-weight:800;letter-spacing:.18em;color:#0b5cff12;white-space:nowrap;pointer-events:none}.guide-page figcaption{text-align:center;font-size:12px;color:#72819a;margin-top:10px}.contact-email-panel{margin-top:34px;padding:34px;border-radius:22px;background:radial-gradient(circle at 90% 10%,#7756ff44,transparent 30%),linear-gradient(135deg,#061b3f,#0b5cff);color:#fff}.contact-email-panel .kicker{color:#7ce8ff}.contact-email-panel h2{margin:8px 0}.contact-email-panel>a{font-size:clamp(24px,4vw,38px);font-weight:850;color:#fff}.contact-email-panel p{color:#c9daf8;margin-bottom:0}
@media(max-width:1320px){.main-nav{position:fixed;inset:92px 16px auto;background:#fff;box-shadow:var(--shadow);border:1px solid var(--line);border-radius:16px;padding:14px;display:none;grid-template-columns:repeat(2,minmax(0,1fr));align-items:stretch;gap:7px}.main-nav.open{display:grid}.main-nav a.nav-item{padding:11px}.menu-toggle{display:block}.brand{min-width:0}}
@media(max-width:720px){.reader-notice{top:76px;display:block}.reader-jump{margin-top:12px}.main-nav{grid-template-columns:1fr}.mission-visual{grid-template-columns:1fr}.cta-actions{margin-top:20px}.guide-section{padding-top:18px}.site-header .container{width:min(100% - 24px,1380px)}}