:root{--ink:#071827;--navy:#071d32;--blue:#087ea4;--cyan:#27c4d8;--paper:#f3f5f4;--white:#fff;--muted:#63717b;--line:#dce2e3;--amber:#d79b4c}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.7}a{color:inherit;text-decoration:none}.site-header{height:78px;padding:0 clamp(22px,5vw,76px);display:flex;align-items:center;justify-content:space-between;background:#fff;position:relative;z-index:20;border-bottom:1px solid rgba(7,24,39,.08)}.site-header.dark{background:var(--navy);color:#fff;border-bottom-color:rgba(255,255,255,.12)}.brand{display:flex;align-items:center;gap:12px;font-size:17px;font-weight:700;letter-spacing:.12em}.brand-logo{width:44px;height:44px;object-fit:contain;flex:0 0 auto}.brand small{display:block;font-size:7px;font-weight:600;letter-spacing:.28em;opacity:.56;margin-top:1px}.site-header nav{display:flex;align-items:center;gap:34px}.site-header nav a{font-size:14px;position:relative;padding:27px 0}.site-header nav a:after{content:"";position:absolute;left:0;right:100%;bottom:18px;height:2px;background:var(--cyan);transition:.2s}.site-header nav a:hover:after,.site-header nav a.active:after{right:0}.nav-toggle{display:none;border:1px solid currentColor;background:none;color:inherit;padding:7px 12px}.hero{height:min(760px,calc(100vh - 78px));min-height:600px;position:relative;background:#061728;color:#fff;overflow:hidden}.hero>img{width:100%;height:100%;object-fit:cover}.hero-shade{position:absolute;inset:0;background:linear-gradient(90deg,rgba(3,16,31,.95) 0%,rgba(3,16,31,.72) 39%,rgba(3,16,31,.1) 72%),linear-gradient(0deg,rgba(3,15,28,.72),transparent 44%)}.hero-content{position:absolute;left:clamp(24px,8vw,140px);top:50%;transform:translateY(-57%);max-width:660px}.eyebrow,.section-no{font-size:11px;letter-spacing:.26em;font-weight:800;color:var(--cyan)}.hero h1{font-size:clamp(48px,6vw,88px);line-height:1.08;margin:22px 0 24px;letter-spacing:-.04em}.hero-content>p{max-width:560px;color:#c6d5de;font-size:17px}.hero-actions{display:flex;align-items:center;gap:28px;margin-top:36px}.btn{display:inline-flex;align-items:center;justify-content:center;border:0;min-height:49px;padding:0 28px;font-size:14px;font-weight:700;cursor:pointer}.btn-primary{background:var(--cyan);color:var(--navy)}.btn-primary:hover{background:#52d7e5}.text-link{font-weight:700;font-size:14px}.text-link.light{color:#fff}.hero-stats{position:absolute;right:6vw;bottom:0;display:flex;background:rgba(4,23,40,.88);backdrop-filter:blur(10px)}.hero-stats div{padding:22px 34px;border-left:1px solid rgba(255,255,255,.12)}.hero-stats strong,.hero-stats span{display:block}.hero-stats strong{font-size:22px;color:var(--cyan)}.hero-stats span{font-size:11px;color:#aebfc9}.section{max-width:1240px;margin:0 auto;padding-left:30px;padding-right:30px}.intro-grid{padding-top:110px;padding-bottom:100px;display:grid;grid-template-columns:1fr 1fr;gap:9vw;align-items:end}.intro-grid h2,.latest-head h2,.about-intro h2,.contact-copy h2{font-size:clamp(34px,4vw,58px);line-height:1.2;margin:18px 0 0;letter-spacing:-.04em}.intro-grid>p{font-size:18px;color:var(--muted);max-width:560px}.topics{display:grid;grid-template-columns:repeat(4,1fr);padding-bottom:100px}.topics article{padding:38px 28px;border:1px solid var(--line);border-right:0;min-height:230px;background:#fff}.topics article:last-child{border-right:1px solid var(--line)}.topics article>span{font:italic 700 13px Georgia;color:var(--cyan)}.topics h3{font-size:23px;margin:46px 0 8px}.topics p{font-size:13px;color:var(--muted)}.latest-head{display:flex;justify-content:space-between;align-items:end;padding-bottom:36px}.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;padding-bottom:120px}.article-card{background:#fff;transition:.25s}.article-card:hover{transform:translateY(-6px);box-shadow:0 18px 50px rgba(7,29,50,.1)}.article-cover{height:220px;position:relative;overflow:hidden;background-color:#0a273f}.article-cover:before,.article-cover:after{content:"";position:absolute}.article-cover:before{inset:0;background:repeating-linear-gradient(90deg,transparent 0 18px,rgba(39,196,216,.16) 19px 20px),repeating-linear-gradient(0deg,transparent 0 18px,rgba(39,196,216,.12) 19px 20px)}.article-cover:after{width:170px;height:170px;border:20px solid rgba(39,196,216,.55);border-radius:50%;right:-30px;bottom:-55px;box-shadow:0 0 60px rgba(39,196,216,.4)}.cover-space{background:radial-gradient(circle at 70% 35%,#74dce7 0 3%,#0b5470 4% 18%,#061829 19%)}.cover-ai{background:linear-gradient(135deg,#071827,#104d67 58%,#7d58a5)}.cover-quantum{background:radial-gradient(circle at 55% 50%,#d79b4c 0 3%,#45356f 4% 22%,#071827 23%)}.cover-science{background:linear-gradient(135deg,#071827,#155d66 55%,#51b8a0)}.cover-energy{background:linear-gradient(135deg,#06283a,#15858a 58%,#d1ae52)}.cover-material{background:radial-gradient(circle at 65% 45%,#e7aa5a 0 6%,#80587d 7% 25%,#071827 26%)}.cover-bio{background:radial-gradient(circle at 58% 48%,#7ce0c0 0 4%,#176b70 5% 20%,#071827 21%)}.cover-xr{background:linear-gradient(135deg,#071827,#314f93 55%,#b05c9a)}.cover-ocean{background:linear-gradient(145deg,#031724,#075a79 58%,#27c4d8)}.cover-security{background:radial-gradient(circle at 60% 45%,#27c4d8 0 5%,#16475c 6% 22%,#071827 23%)}.cover-robot{background:linear-gradient(125deg,#071827 15%,#0a7593 72%,#1ec2d3)}.cover-lab{background:radial-gradient(circle at 60% 40%,#62d6df 0 5%,#0c5671 6% 18%,#071b2e 19%)}.cover-vision{background:linear-gradient(135deg,#061a2b,#0d425b 55%,#b27936)}.article-cover>span{position:absolute;left:20px;top:18px;z-index:2;padding:5px 10px;background:rgba(6,24,41,.78);color:#fff;font-size:11px;letter-spacing:.08em}.article-body{padding:26px}.meta{font-size:11px;letter-spacing:.08em;color:#71808a;text-transform:uppercase}.article-body h3{font-size:21px;line-height:1.45;margin:13px 0}.article-body p{font-size:14px;color:var(--muted);min-height:70px}.read-more{display:inline-block;color:#08718f;font-size:13px;font-weight:700;margin-top:12px}.page-hero{background:var(--navy);color:#fff;padding:95px max(30px,calc((100vw - 1180px)/2)) 105px}.page-hero h1{font-size:clamp(52px,7vw,90px);line-height:1;margin:18px 0 26px}.page-hero p{max-width:620px;color:#b9c8d2;font-size:17px}.filter-row{display:flex;gap:32px;padding-top:45px;padding-bottom:25px;border-bottom:1px solid var(--line);font-size:14px;color:var(--muted)}.filter-row .active{font-weight:700;color:var(--ink)}.article-list{padding-top:30px;padding-bottom:110px}.article-row{display:grid;grid-template-columns:340px 1fr;gap:42px;padding:26px 0;border-bottom:1px solid var(--line)}.article-row .article-cover{height:210px}.article-row-content h2{font-size:27px;line-height:1.35;margin:10px 0}.article-row-content p{color:var(--muted);margin:0}.row-foot{display:flex;justify-content:space-between;align-items:center;margin-top:22px}.price{font:700 19px Georgia;color:var(--ink)}.detail-main{max-width:1180px;margin:auto;padding:35px 30px 110px}.back-link{display:inline-block;color:var(--muted);font-size:13px;margin-bottom:35px}.detail-layout{display:grid;grid-template-columns:minmax(0,780px) 280px;gap:65px;align-items:start}.detail-copy h1{font-size:clamp(38px,5vw,62px);line-height:1.18;letter-spacing:-.04em;margin:18px 0}.lead{font-size:19px;color:var(--muted)}.detail-cover{height:390px;margin:40px 0}.prose{max-width:710px;font-family:"Noto Serif SC","Songti SC",serif;font-size:17px;line-height:2}.prose p{margin:0 0 1.7em}.service-card{position:sticky;top:28px;background:#fff;border:1px solid var(--line);padding:24px;text-align:center}.service-card h3{margin:18px 0 5px}.service-card p,.service-card small{color:var(--muted);font-size:12px}.qr-demo{width:180px;height:180px;margin:auto;position:relative;display:grid;place-items:center;background-color:#fff;background-image:linear-gradient(90deg,#071827 50%,transparent 50%),linear-gradient(#071827 50%,transparent 50%);background-size:14px 14px;border:14px solid #fff;box-shadow:0 0 0 1px var(--line)}.qr-demo:before,.qr-demo:after,.qr-corners{content:"";position:absolute;width:42px;height:42px;border:9px solid #071827;background:#fff}.qr-demo:before{left:5px;top:5px}.qr-demo:after{right:5px;top:5px}.qr-corners{left:5px;bottom:5px}.qr-demo span{z-index:2;background:var(--cyan);color:var(--navy);font-weight:900;padding:7px 11px}.fade-copy{max-height:105px;overflow:hidden;position:relative;color:#7e898f;filter:blur(3px)}.fade-copy:after{content:"";position:absolute;inset:30% 0 0;background:linear-gradient(transparent,var(--paper))}.unlock-box{text-align:center;border:1px solid var(--line);background:#fff;padding:42px 25px;margin-top:-8px;position:relative}.unlock-box span{font:700 10px sans-serif;letter-spacing:.24em;color:var(--cyan)}.unlock-box h2{font-family:"PingFang SC",sans-serif;margin:9px 0}.unlock-box p{font-family:"PingFang SC",sans-serif;color:var(--muted);font-size:13px}.paid-badge{border-left:3px solid var(--cyan);background:#e9f7f8;padding:14px 18px;font-family:sans-serif;font-size:13px}.site-footer{background:#061728;color:#fff;padding:65px max(30px,calc((100vw - 1180px)/2));display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:60px}.site-footer p,.site-footer small{display:block;color:#94a7b3;font-size:12px}.footer-links{display:grid;grid-template-columns:1fr 1fr;gap:12px;font-size:13px}.about-hero h1{line-height:1.13}.about-intro{padding-top:100px;padding-bottom:90px;display:grid;grid-template-columns:1fr 2fr;gap:8vw}.about-intro p{font-size:17px;color:var(--muted)}.values{display:grid;grid-template-columns:repeat(3,1fr);padding-bottom:120px}.values article{padding:40px;border-top:2px solid var(--ink);background:#fff;margin-right:1px}.values b{font:italic 700 18px Georgia;color:var(--cyan)}.values h3{font-size:28px;margin:40px 0 10px}.values p{color:var(--muted);font-size:14px}.contact-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:9vw;padding-top:100px;padding-bottom:120px}.contact-copy p{color:var(--muted);max-width:460px}.contact-list{border-top:2px solid var(--ink)}.contact-list>div{display:grid;grid-template-columns:110px 1fr;gap:30px;padding:23px 0;border-bottom:1px solid var(--line)}.contact-list span{font-size:12px;color:var(--muted)}.pay-body{background:#eef2f3;min-height:100vh}.pay-header{height:78px;background:#fff;padding:0 max(25px,calc((100vw - 1120px)/2));display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.secure{font-size:12px;color:#4b7a63}.payment-wrap{max-width:1120px;margin:40px auto;padding:0 24px}.demo-notice{background:#fff7e9;border:1px solid #ead4ad;color:#70542c;padding:15px 20px;display:flex;gap:20px;margin-bottom:20px;font-size:13px}.payment-grid{display:grid;grid-template-columns:1.15fr .85fr;background:#fff;box-shadow:0 18px 60px rgba(7,29,50,.08)}.order-panel,.cashier-panel{padding:45px}.order-panel{border-right:1px solid var(--line)}.order-panel h1{font-size:36px;margin:12px 0 30px}.order-product{display:grid;grid-template-columns:105px 1fr;gap:20px;padding:24px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.mini-cover{height:100px;background:#0a7593}.order-product h2{font-size:18px;line-height:1.5;margin:5px 0}.order-product p,.order-product small{font-size:12px;color:var(--muted)}dl{margin:25px 0}dl>div{display:flex;justify-content:space-between;padding:10px 0;font-size:13px}dt{color:var(--muted)}dd{margin:0;text-align:right}.cashier-title{display:flex;justify-content:space-between;align-items:center}.cashier-title strong{font:700 34px Georgia;color:#1677ff}.method{display:flex;align-items:center;gap:14px;border:2px solid #1677ff;padding:16px;margin:28px 0}.method div{flex:1}.method small,.method b{display:block}.method small{font-size:11px;color:var(--muted)}.alipay-icon{display:grid;place-items:center;width:40px;height:40px;border-radius:8px;color:#fff;background:#1677ff;font-weight:700}.method i{color:#1677ff}.pay-steps{display:flex;justify-content:space-between;margin:35px 0}.pay-steps div{text-align:center;font-size:11px;color:var(--muted)}.pay-steps b{display:grid;place-items:center;width:28px;height:28px;border-radius:50%;background:#eaf3ff;color:#1677ff;margin:0 auto 6px}.agreement{display:flex;align-items:flex-start;gap:8px;font-size:12px;color:var(--muted);margin-bottom:14px}.btn-alipay{width:100%;background:#1677ff;color:#fff}.pay-help{font-size:11px;color:#87949c;line-height:1.6}.success-card{max-width:620px;margin:9vh auto;background:#fff;padding:55px;text-align:center;box-shadow:0 20px 70px rgba(7,29,50,.1)}.success-icon{display:grid;place-items:center;width:64px;height:64px;margin:0 auto 20px;border-radius:50%;background:#e4f7ed;color:#249861;font-size:32px}.success-card h1{font-size:34px}.success-card>p{color:var(--muted)}.success-card dl{text-align:left;background:#f5f7f7;padding:15px 22px}.success-card .btn{margin:15px 10px}.success-card .text-link{display:block;margin-top:10px}
.trend-section{background:#e9eeed;padding:105px 0}.trend-head{display:grid;grid-template-columns:1fr 1fr;gap:9vw;align-items:end;margin-bottom:48px}.trend-head h2,.editorial h2,.reading-service h2{font-size:clamp(34px,4vw,58px);line-height:1.18;letter-spacing:-.04em;margin:18px 0 0}.trend-head>p{color:var(--muted);font-size:16px}.trend-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:#cfd8d8;padding-left:30px;padding-right:30px}.trend-grid article{display:flex;gap:24px;background:#fff;padding:36px 30px;min-height:270px}.trend-grid b{font:italic 700 16px Georgia;color:var(--cyan)}.trend-grid span{font-size:10px;letter-spacing:.18em;color:var(--muted)}.trend-grid h3{font-size:23px;line-height:1.4;margin:15px 0}.trend-grid p{font-size:13px;color:var(--muted)}.editorial{margin-bottom:110px;background:var(--navy);color:#fff;display:grid;grid-template-columns:1.35fr 1fr;gap:70px;padding-top:70px;padding-bottom:70px}.editorial-copy p{color:#b5c5ce;max-width:650px}.editorial-copy .text-link{display:inline-block;margin-top:20px;color:var(--cyan)}.editorial-points{border-top:1px solid rgba(255,255,255,.18)}.editorial-points>div{padding:20px 0;border-bottom:1px solid rgba(255,255,255,.18)}.editorial-points strong,.editorial-points span{display:block}.editorial-points span{font-size:12px;color:#94a7b3;margin-top:3px}.reading-service{max-width:1240px;margin:0 auto 120px;padding:70px clamp(30px,6vw,90px);background:linear-gradient(120deg,#09243a,#0c5268);color:#fff;display:flex;justify-content:space-between;align-items:end;gap:40px}.reading-service p{color:#b9ccd5}.reading-service .btn{flex:0 0 auto}
@media(max-width:800px){.site-header{height:68px;padding:0 20px}.nav-toggle{display:block}.site-header nav{display:none;position:absolute;left:0;right:0;top:68px;background:var(--navy);color:#fff;padding:12px 24px;flex-direction:column;align-items:stretch;gap:0}.site-header nav.open{display:flex}.site-header nav a{padding:13px 0}.hero{min-height:670px;height:calc(100vh - 68px)}.hero-shade{background:linear-gradient(90deg,rgba(3,16,31,.92),rgba(3,16,31,.44)),linear-gradient(0deg,rgba(3,15,28,.9),transparent)}.hero-content{left:24px;right:24px;top:43%}.hero h1{font-size:49px}.hero-stats{left:0;right:0}.hero-stats div{flex:1;padding:15px 10px;text-align:center}.hero-stats strong{font-size:17px}.intro-grid,.about-intro,.contact-grid,.trend-head{grid-template-columns:1fr;gap:25px;padding-top:70px;padding-bottom:65px}.topics{grid-template-columns:1fr 1fr}.topics article{min-height:190px}.trend-section{padding:20px 0 70px}.trend-head{margin-bottom:0}.trend-grid{grid-template-columns:1fr}.trend-grid article{min-height:0}.article-grid{grid-template-columns:1fr}.article-row{grid-template-columns:1fr;gap:0}.article-row .article-cover{height:200px}.article-row-content{padding:22px 5px}.editorial{grid-template-columns:1fr;gap:45px;margin-bottom:70px}.reading-service{margin:0 20px 80px;display:block}.reading-service .btn{margin-top:20px}.detail-layout{grid-template-columns:1fr}.service-card{position:static;order:-1}.detail-copy h1{font-size:39px}.detail-cover{height:260px}.site-footer{grid-template-columns:1fr;gap:30px}.values{grid-template-columns:1fr}.payment-grid{grid-template-columns:1fr}.order-panel{border-right:0;border-bottom:1px solid var(--line)}.order-panel,.cashier-panel{padding:28px}.demo-notice{flex-direction:column;gap:3px}.pay-header{padding:0 18px}.secure{display:none}.success-card{margin:20px;padding:35px 22px}.contact-list>div{grid-template-columns:90px 1fr}} 
.redirect-icon{margin:0 auto 20px}.success-icon.pending{background:#fff2d9;color:#b67a22}.demo-notice.live{background:#edf8f4;border-color:#b9ded0;color:#275f4c}
.auth-links{display:flex;align-items:center;gap:16px}.auth-links .register-link{background:var(--cyan);color:var(--navy);padding:8px 16px}.user-menu{position:relative}.user-menu summary{list-style:none;display:flex;align-items:center;gap:9px;cursor:pointer;font-size:14px;font-weight:700}.user-menu summary::-webkit-details-marker{display:none}.nav-avatar{width:34px;height:34px;border-radius:50%;overflow:hidden;display:inline-flex;flex:0 0 auto;background:#dcecef}.nav-avatar img,.account-avatar img{width:100%;height:100%;object-fit:cover}.user-menu>div{position:absolute;right:0;top:48px;width:150px;background:#fff;color:var(--ink);box-shadow:0 15px 40px rgba(7,29,50,.18);border:1px solid var(--line);padding:8px}.site-header .user-menu>div a,.user-menu button{display:block;width:100%;padding:10px 12px!important;text-align:left;border:0;background:none;color:inherit;font:inherit;font-size:13px;cursor:pointer}.site-header .user-menu>div a:after{display:none}.user-menu button:hover,.user-menu>div a:hover{background:#edf5f5}.pay-user{display:flex;align-items:center;gap:10px;font-size:13px}.pay-user .secure{margin-left:15px}
.auth-page{min-height:calc(100vh - 78px);display:grid;grid-template-columns:1fr 480px;gap:8vw;align-items:center;max-width:1120px;margin:auto;padding:65px 30px}.auth-intro h1{font-size:clamp(48px,6vw,78px);line-height:1.08;margin:18px 0}.auth-intro p{max-width:500px;color:var(--muted);font-size:17px}.auth-card,.settings-card{background:#fff;border:1px solid var(--line);padding:38px}.auth-card h2,.settings-card h2{margin:0 0 25px;font-size:27px}.auth-card label,.settings-card label{display:block;font-size:13px;font-weight:700;margin:0 0 18px}.auth-card input,.settings-card input{display:block;width:100%;height:46px;border:1px solid #cfd8da;background:#fafcfc;padding:0 13px;margin-top:7px;font:inherit}.auth-card label small,.settings-card label small{display:block;color:var(--muted);font-size:11px;font-weight:400;margin-top:5px}.auth-submit{width:100%;margin-top:8px}.auth-switch{text-align:center;font-size:13px;color:var(--muted);margin:22px 0 0}.auth-switch a{color:var(--blue);font-weight:700}.form-message{padding:12px 15px;margin-bottom:20px;font-size:13px}.form-message.error{background:#fff0ee;color:#9a3d32;border:1px solid #efc4bf}.form-message.success{background:#e8f7ef;color:#26714c;border:1px solid #b9dfca}.captcha-row{display:grid;grid-template-columns:1fr 160px;gap:10px;align-items:end}.captcha-row img{width:160px;height:52px;border:1px solid var(--line);cursor:pointer}
.account-hero{background:var(--navy);color:#fff;padding:70px max(30px,calc((100vw - 1180px)/2));display:flex;align-items:center;gap:28px}.account-avatar{width:92px;height:92px;border-radius:50%;overflow:hidden;border:3px solid rgba(255,255,255,.35);background:#dcecef}.account-hero h1{font-size:42px;margin:8px 0 0}.account-hero p{margin:0;color:#9eb2bf}.account-message{margin-top:35px}.account-grid{display:grid;grid-template-columns:380px 1fr;gap:35px;padding-top:50px;padding-bottom:100px;align-items:start}.account-settings{display:grid;gap:20px}.settings-card{padding:28px}.settings-card .btn{min-height:42px}.orders-panel{background:#fff;border:1px solid var(--line);padding:35px}.orders-head h2{font-size:34px;margin:7px 0 25px}.order-list{display:grid;gap:15px}.order-list article{border:1px solid var(--line);padding:22px}.order-list article>div:first-child{display:flex;justify-content:space-between;align-items:center}.order-list h3{font-size:18px;margin:14px 0}.order-list small{color:var(--muted)}.order-status{font-size:11px;font-weight:800;padding:4px 9px;background:#fff3db;color:#9b681e}.order-status.paid{background:#e3f5eb;color:#237149}.order-status.closed{background:#edf0f1;color:#69757b}.order-list dl{margin:10px 0}.order-list dl>div{padding:4px 0}.empty-orders{text-align:center;padding:70px 20px;color:var(--muted)}.empty-orders h3{color:var(--ink);font-size:24px}
@media(max-width:800px){.auth-links{display:flex;flex-direction:column;align-items:stretch;gap:0}.auth-links .register-link{background:none;color:inherit;padding:13px 0}.user-menu summary{padding:12px 0}.user-menu>div{position:static;width:100%;box-shadow:none}.auth-page{grid-template-columns:1fr;padding-top:45px}.auth-intro h1{font-size:46px}.auth-card{padding:26px}.captcha-row{grid-template-columns:1fr 130px}.captcha-row img{width:130px}.account-grid{grid-template-columns:1fr}.account-hero{padding-top:45px;padding-bottom:45px}.orders-panel{padding:22px}.pay-user .secure{display:none}}