*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:108px}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:#43566a;background:#fff;line-height:1.75;overflow-x:hidden}body.menu-open{overflow:hidden}a{color:inherit;text-decoration:none}img{max-width:100%;height:auto;display:block}button,input,textarea{font:inherit}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;left:16px;top:-80px;z-index:1000;background:#16283c;color:#fff;padding:10px 16px;border-radius:8px}.skip-link:focus{top:16px}.security-strip{min-height:34px;display:flex;align-items:center;justify-content:center;padding:5px 20px;background:#edf4fb;color:#245f9e;font-size:13px;text-align:center}.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.94);border-bottom:1px solid #dce7f2;backdrop-filter:blur(14px)}.header-inner{max-width:1240px;margin:auto;height:74px;padding:0 24px;display:flex;align-items:center;gap:28px}.brand{display:inline-flex;align-items:center;gap:10px;font-weight:800;color:#16283c;font-size:20px;flex:none}.brand img{width:38px;height:38px;object-fit:contain}.desktop-nav{display:flex;align-items:stretch;justify-content:center;gap:4px;flex:1;height:100%}.nav-group{display:flex;align-items:center;position:relative}.nav-trigger,.plain-nav{height:100%;min-width:76px;border:0;background:transparent;color:#344b62;padding:0 14px;display:flex;align-items:center;justify-content:center;gap:7px;cursor:pointer;position:relative}.nav-trigger:after,.plain-nav:after{content:"";position:absolute;left:18px;right:18px;bottom:0;height:3px;background:#3f8fe5;transform:scaleX(0);transition:.2s}.nav-group.is-active .nav-trigger:after,.nav-trigger[aria-expanded="true"]:after,.plain-nav.is-active:after{transform:scaleX(1)}.nav-trigger:focus-visible,.plain-nav:focus-visible,.button:focus-visible,.mobile-menu-button:focus-visible,.faq-question:focus-visible,.tab-button:focus-visible{outline:3px solid rgba(63,143,229,.35);outline-offset:2px}.mega-menu{position:fixed;top:108px;left:50%;transform:translateX(-50%);width:min(1120px,calc(100vw - 48px));padding:30px;background:#fff;border:1px solid #dce7f2;border-radius:0 0 20px 20px;box-shadow:0 16px 42px rgba(42,93,145,.1);display:grid;grid-template-columns:1.1fr 2fr .9fr;gap:28px}.mega-menu[hidden]{display:none}.mega-intro strong{font-size:20px;color:#16283c}.mega-intro p{margin:8px 0 0;color:#718296}.mega-links{display:grid;grid-template-columns:1fr 1fr;gap:8px}.mega-links a{display:flex;justify-content:space-between;padding:11px 12px;border-radius:8px;color:#344b62}.mega-links a:hover{background:#edf4fb;color:#245f9e}.mega-featured{background:#f5f8fc;padding:18px;border-radius:14px;align-self:stretch;display:flex;flex-direction:column;justify-content:center}.mega-featured span{font-size:12px;color:#718296}.mega-featured strong{margin-top:8px;color:#245f9e}.header-actions{display:flex;align-items:center;gap:10px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:10px 22px;border-radius:10px;background:#3f8fe5;color:#fff;font-weight:700;border:1px solid #3f8fe5;cursor:pointer;touch-action:manipulation}.button:hover{background:#2d7fd2;border-color:#2d7fd2}.button-secondary{background:#fff;color:#245f9e;border-color:#bcd3eb}.button-secondary:hover{background:#edf4fb}.button-light{background:#fff;color:#245f9e;border-color:#fff}.button-small{min-height:44px;padding:8px 18px}.text-link{color:#245f9e;font-weight:700}.text-link:hover{text-decoration:underline}.mobile-menu-button{display:none;width:44px;height:44px;border:1px solid #dce7f2;border-radius:10px;background:#fff;align-items:center;justify-content:center;flex-direction:column;gap:5px;cursor:pointer;position:relative;z-index:2}.mobile-menu-button span:not(.sr-only){width:20px;height:2px;background:#16283c}.mobile-menu{position:fixed;inset:0;z-index:300;background:#fff;opacity:0;transform:translateY(-12px);transition:.18s}.mobile-menu.is-open{opacity:1;transform:none}.mobile-menu[hidden]{display:none}.mobile-menu-head{height:76px;padding:0 20px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #dce7f2}.mobile-menu-close{width:44px;height:44px;border:0;background:#f5f8fc;border-radius:10px;font-size:30px;cursor:pointer}.mobile-menu-body{height:calc(100dvh - 76px);overflow:auto;padding:14px 20px 32px}.mobile-nav-group{border-bottom:1px solid #dce7f2}.mobile-accordion{width:100%;min-height:54px;background:#fff;border:0;padding:0;display:flex;justify-content:space-between;align-items:center;font-weight:800;color:#16283c;cursor:pointer}.mobile-panel{padding:0 0 14px;display:grid;grid-template-columns:1fr 1fr;gap:8px}.mobile-panel[hidden]{display:none}.mobile-panel a{padding:10px;background:#f5f8fc;border-radius:8px}.mobile-secondary{display:grid;gap:12px;padding-top:22px}.mobile-secondary>a:not(.button){padding:8px 0;color:#245f9e}
main{min-height:60vh}.container{width:min(1180px,calc(100% - 40px));margin:auto}.section{padding:92px 0}.section-compact{padding:64px 0}.section-soft{background:#f5f8fc}.section-alt{background:#edf4fb}.eyebrow{font-size:13px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:#3f8fe5}.section-heading{max-width:720px;margin-bottom:36px}.section-heading h2{font-size:clamp(30px,4vw,48px);line-height:1.18;color:#16283c;margin:8px 0 16px}.section-heading p{margin:0;color:#718296;font-size:17px}.hero{padding:78px 0 68px;background:linear-gradient(180deg,#f8fbff 0,#fff 100%)}.hero-grid{display:grid;grid-template-columns:42% 58%;align-items:center;gap:64px}.hero-art{background:#edf4fb;border-radius:34px;padding:34px 24px;min-height:520px;display:flex;align-items:center;justify-content:center;position:relative}.hero-art:before{content:"";position:absolute;width:120px;height:120px;border-radius:50%;background:#dbeeff;left:-28px;top:46px}.hero-art img{max-height:500px;object-fit:contain;position:relative}.hero-copy h1{font-size:clamp(42px,6vw,72px);line-height:1.08;margin:14px 0 20px;color:#16283c;letter-spacing:-.04em}.hero-subtitle{font-size:20px;color:#245f9e;font-weight:800}.hero-copy>p{font-size:17px;max-width:720px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:28px 0}.capability-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}.capability-tags span{padding:7px 10px;background:#eaf4ff;color:#245f9e;border-radius:6px;font-size:13px;font-weight:700}.hero-links{display:flex;flex-wrap:wrap;gap:22px;margin-top:24px}.quick-tasks{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid #dce7f2;border-bottom:1px solid #dce7f2}.quick-task{padding:30px 24px;border-right:1px solid #dce7f2}.quick-task:last-child{border-right:0}.quick-task .number{color:#3f8fe5;font-weight:900}.quick-task h2{font-size:20px;color:#16283c;margin:14px 0 8px}.quick-task p{font-size:14px;color:#718296}.bento{display:grid;grid-template-columns:1.35fr 1fr .8fr;grid-auto-rows:minmax(210px,auto);gap:18px}.bento-item{border:1px solid #dce7f2;border-radius:20px;padding:28px;background:#fff;overflow:hidden;position:relative}.bento-item h3{font-size:24px;color:#16283c;margin:0 0 10px}.bento-item p{margin:0 0 16px}.bento-large{grid-row:span 2;background:#edf4fb}.bento-wide{grid-column:span 2;background:#f5f8fc;display:grid;grid-template-columns:1.1fr .9fr;align-items:center;gap:20px}.bento-item img{max-height:220px;object-fit:contain;margin:22px auto 0}.bento-wide img{margin:0 auto}.process-line{display:grid;grid-template-columns:repeat(6,1fr);gap:0;position:relative}.process-line:before{content:"";position:absolute;left:4%;right:4%;top:27px;height:1px;background:#bcd3eb}.process-step{position:relative;padding:0 14px}.process-dot{width:54px;height:54px;border-radius:50%;border:1px solid #bcd3eb;background:#fff;display:flex;align-items:center;justify-content:center;color:#245f9e;font-weight:900;position:relative}.process-step:nth-child(even){padding-top:76px}.process-step:nth-child(even) .process-dot{margin-top:-76px}.process-step h3{font-size:18px;color:#16283c;margin:18px 0 8px}.process-step p{font-size:14px;color:#718296}.tabs-wrap{border:1px solid #dce7f2;border-radius:22px;background:#fff;overflow:hidden}.tab-list{display:flex;gap:0;overflow:auto;border-bottom:1px solid #dce7f2;background:#f5f8fc}.tab-button{min-width:150px;min-height:54px;padding:12px 18px;border:0;border-right:1px solid #dce7f2;background:transparent;color:#566b7f;font-weight:800;cursor:pointer}.tab-button[aria-selected="true"]{background:#fff;color:#245f9e;box-shadow:inset 0 -3px #3f8fe5}.tab-panel{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:42px;padding:42px}.tab-panel[hidden]{display:none}.tab-panel img{max-height:300px;margin:auto;object-fit:contain}.security-band{background:#245f9e;color:#eaf4ff}.security-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:64px;align-items:center}.security-grid h2{color:#fff;font-size:clamp(34px,4vw,52px);line-height:1.15}.security-grid p{font-size:17px}.security-visual{display:grid;grid-template-columns:1fr 1fr;gap:18px;align-items:center}.security-visual img{max-height:260px;filter:drop-shadow(0 18px 30px rgba(0,0,0,.12))}.check-list{list-style:none;padding:0;margin:0;display:grid;gap:12px}.check-list li{padding:12px 14px 12px 42px;background:rgba(255,255,255,.1);border-radius:10px;position:relative}.check-list li:before{content:"✓";position:absolute;left:15px;color:#fff;font-weight:900}.editorial{display:grid;grid-template-columns:1.25fr .9fr;gap:48px}.feature-article{background:#edf4fb;padding:40px;border-radius:24px}.feature-article h3{font-size:32px;color:#16283c;margin:10px 0 16px}.article-list{display:grid}.article-row{padding:18px 0;border-bottom:1px solid #dce7f2}.article-row:first-child{padding-top:0}.article-row span{display:inline-block;font-size:12px;color:#245f9e;background:#eaf4ff;padding:3px 8px;border-radius:4px}.article-row h3{font-size:18px;color:#16283c;margin:8px 0 6px}.article-row p{font-size:14px;color:#718296;margin:0}.comparison{display:grid;grid-template-columns:1.15fr .85fr;gap:24px}.app-side{background:#edf4fb;border-radius:24px;padding:40px;display:grid;grid-template-columns:1fr .7fr;gap:28px;align-items:center}.app-side img{max-height:320px;margin:auto}.web-side{border:1px solid #dce7f2;border-radius:24px;padding:40px}.plain-list{padding-left:20px}.knowledge-risk{display:grid;grid-template-columns:1fr 1fr;gap:24px}.knowledge-box,.risk-box{padding:34px;border-radius:20px}.knowledge-box{background:#f5f8fc}.risk-box{border:1px solid #dce7f2}.timeline{position:relative;margin-left:12px}.timeline:before{content:"";position:absolute;left:9px;top:8px;bottom:8px;width:1px;background:#bcd3eb}.timeline-item{position:relative;padding:0 0 30px 50px}.timeline-item:last-child{padding-bottom:0}.timeline-item:before{content:"";position:absolute;left:1px;top:5px;width:17px;height:17px;border-radius:50%;background:#fff;border:4px solid #3f8fe5}.timeline-item small{color:#3f8fe5;font-weight:800}.timeline-item h3{margin:4px 0 6px;color:#16283c}.faq-list{border-top:1px solid #dce7f2}.faq-item{border-bottom:1px solid #dce7f2}.faq-question{width:100%;min-height:66px;border:0;background:#fff;text-align:left;padding:16px 52px 16px 0;font-weight:800;color:#16283c;cursor:pointer;position:relative}.faq-question:after{content:"＋";position:absolute;right:8px}.faq-question[aria-expanded="true"]:after{content:"−"}.faq-answer{padding:0 48px 20px 0;color:#566b7f}.faq-answer[hidden]{display:none}.final-cta{background:#163f69;color:#eaf4ff;border-radius:28px;padding:54px;display:flex;align-items:center;justify-content:space-between;gap:34px}.final-cta h2{color:#fff;font-size:38px;line-height:1.2;margin:0 0 12px}.final-cta p{margin:0;max-width:720px}.final-actions{display:flex;gap:10px;flex-wrap:wrap;flex:none}
.inner-hero{padding:72px 0 54px;background:#f8fbff;border-bottom:1px solid #dce7f2}.breadcrumbs{font-size:13px;color:#718296;margin-bottom:22px}.breadcrumbs a{color:#245f9e}.inner-hero-grid{display:grid;grid-template-columns:1fr minmax(220px,360px);gap:52px;align-items:center}.inner-hero h1{font-size:clamp(38px,5vw,60px);line-height:1.1;color:#16283c;margin:10px 0 18px}.inner-hero .lead{font-size:18px;max-width:800px}.inner-hero img{max-height:320px;margin:auto;object-fit:contain}.hero-metric{padding:26px;border:1px solid #dce7f2;background:#fff;border-radius:20px}.hero-metric strong{display:block;font-size:30px;color:#245f9e}.overview-product .inner-hero-grid{grid-template-columns:1.2fr .8fr}.overview-product .hero-metric{transform:rotate(1deg)}.overview-networks .inner-hero{background:#edf4fb}.overview-security .inner-hero{background:#245f9e;color:#eaf4ff}.overview-security .inner-hero h1,.overview-security .breadcrumbs a{color:#fff}.overview-security .hero-metric{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.2)}.overview-security .hero-metric strong{color:#fff}.overview-academy .inner-hero-grid{grid-template-columns:.9fr 1.1fr}.overview-academy .hero-metric{order:-1}.overview-service .inner-hero{background:linear-gradient(120deg,#f5f8fc,#eaf4ff)}.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:64px;align-items:start}.article-body{min-width:0}.article-section{padding:0 0 44px;margin:0 0 44px;border-bottom:1px solid #dce7f2}.article-section:last-of-type{border-bottom:0}.article-section h2{font-size:30px;line-height:1.25;color:#16283c;margin:0 0 18px}.article-section h3{color:#16283c;margin-top:24px}.article-section p{font-size:16px}.article-toc{position:sticky;top:132px;border-left:2px solid #dce7f2;padding:4px 0 4px 18px}.article-toc h2{font-size:15px;color:#16283c;margin:0 0 12px}.article-toc a{display:block;padding:7px 0;color:#718296;font-size:14px}.article-toc a.is-current{color:#245f9e;font-weight:800}.mobile-toc{display:none}.notice{padding:22px 24px;background:#edf4fb;border-left:4px solid #3f8fe5;border-radius:0 12px 12px 0;margin:26px 0}.notice strong{display:block;color:#16283c;margin-bottom:6px}.notice-risk{background:#fff8ed;border-color:#d89a35}.related-guides{padding:30px;background:#f5f8fc;border-radius:18px}.related-guides h2{font-size:24px;color:#16283c;margin-top:0}.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.related-grid a{padding:16px;background:#fff;border:1px solid #dce7f2;border-radius:10px;color:#245f9e;font-weight:700}.support-form{display:grid;gap:14px;max-width:720px}.support-form label{font-weight:800;color:#16283c}.support-form input,.support-form textarea,.support-form select{width:100%;border:1px solid #bcd3eb;border-radius:10px;padding:12px 14px;background:#fff}.support-form textarea{min-height:150px;resize:vertical}.glossary-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.glossary-term{padding:20px;border:1px solid #dce7f2;border-radius:14px}.glossary-term dt{font-weight:900;color:#16283c}.glossary-term dd{margin:6px 0 0}.site-footer{background:#163f69;color:#eaf4ff;padding:64px 0 0}.footer-grid{width:min(1180px,calc(100% - 40px));margin:auto;display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:48px}.brand-light{color:#fff}.footer-grid h2{font-size:15px;color:#fff;margin:0 0 16px}.footer-grid>div:not(.footer-brand){display:flex;flex-direction:column;gap:10px}.footer-grid a:hover{text-decoration:underline}.footer-brand p{max-width:340px}.footer-brand small{color:#bdd2e8}.footer-bottom{margin-top:48px;border-top:1px solid rgba(255,255,255,.14);min-height:74px;padding:18px max(20px,calc((100% - 1180px)/2));display:flex;gap:24px;align-items:center;justify-content:space-between;font-size:13px;color:#bdd2e8}
@media(max-width:980px){.desktop-nav{display:none}.mobile-menu-button{display:flex}.header-inner{height:68px;padding:0 18px}.header-actions{margin-left:auto}.mega-menu{top:102px}.hero-grid{grid-template-columns:1fr;gap:40px}.hero-copy{order:-1}.hero-art{min-height:400px}.quick-tasks{grid-template-columns:1fr 1fr}.quick-task:nth-child(2){border-right:0}.quick-task:nth-child(-n+2){border-bottom:1px solid #dce7f2}.bento{grid-template-columns:1fr 1fr}.bento-large{grid-row:span 1}.bento-wide{grid-column:span 2}.process-line{grid-template-columns:1fr 1fr 1fr;gap:30px}.process-line:before{display:none}.process-step:nth-child(even){padding-top:0}.process-step:nth-child(even) .process-dot{margin-top:0}.security-grid,.editorial,.comparison,.knowledge-risk{grid-template-columns:1fr}.app-side{grid-template-columns:1fr 1fr}.article-layout{grid-template-columns:1fr}.article-toc{display:none}.mobile-toc{display:block;margin-bottom:28px}.mobile-toc summary{cursor:pointer;font-weight:800;color:#16283c;background:#f5f8fc;padding:14px 16px;border-radius:10px}.mobile-toc nav{padding:12px 16px;border:1px solid #dce7f2}.mobile-toc a{display:block;padding:6px 0;color:#245f9e}.footer-grid{grid-template-columns:1.5fr 1fr 1fr}.footer-grid>div:last-child{grid-column:2/4}.inner-hero-grid{grid-template-columns:1fr}.inner-hero img{max-height:260px}.overview-academy .hero-metric{order:0}.related-grid{grid-template-columns:1fr 1fr}}
@media(max-width:680px){html{scroll-padding-top:98px}.security-strip{min-height:36px;font-size:11px;line-height:1.35;padding:5px 12px}.header-actions .button-small{padding:8px 12px;font-size:13px}.brand span{font-size:17px}.brand img{width:34px;height:34px}.container{width:min(100% - 28px,1180px)}.section{padding:64px 0}.section-compact{padding:48px 0}.hero{padding:48px 0}.hero-grid{gap:28px}.hero-art{min-height:320px;padding:24px}.hero-copy h1{font-size:40px}.hero-subtitle{font-size:17px}.hero-actions{display:grid;grid-template-columns:1fr}.button{width:100%}.hero-links{display:grid;gap:10px}.quick-tasks{grid-template-columns:1fr}.quick-task{border-right:0!important;border-bottom:1px solid #dce7f2!important}.quick-task:last-child{border-bottom:0!important}.bento{grid-template-columns:1fr}.bento-wide{grid-column:span 1;grid-template-columns:1fr}.process-line{grid-template-columns:1fr;padding-left:28px}.process-line:before{display:block;left:12px;right:auto;top:8px;bottom:8px;width:1px;height:auto}.process-step{padding:0 0 22px 28px}.process-dot{position:absolute;left:-28px;top:0;width:26px;height:26px;font-size:12px}.process-step h3{margin-top:0}.tab-panel{grid-template-columns:1fr;padding:26px 20px}.tab-panel img{order:-1;max-height:220px}.security-grid{gap:30px}.security-visual{grid-template-columns:1fr}.security-visual img{max-height:220px}.feature-article,.app-side,.web-side{padding:26px}.app-side{grid-template-columns:1fr}.app-side img{order:-1;max-height:250px}.final-cta{padding:34px 24px;display:block}.final-cta h2{font-size:30px}.final-actions{margin-top:24px;display:grid}.inner-hero{padding:48px 0 36px}.inner-hero h1{font-size:38px}.article-section h2{font-size:26px}.related-grid,.glossary-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr;gap:34px}.footer-brand{grid-column:1/3}.footer-grid>div:last-child{grid-column:auto}.footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}.mobile-panel{grid-template-columns:1fr}.section-heading h2{font-size:34px}}