:root{--blue:#1478F2;--blue2:#2F8CFF;--blue3:#075DC9;--ink:#172033;--text:#3E4859;--muted:#6F7A89;--bg2:#F7FAFF;--bg3:#EDF5FF;--line:rgba(30,50,70,.08);--bline:rgba(20,120,242,.12);--shadow:0 14px 38px rgba(21,67,118,.08);--wrap:min(1280px,calc(100% - 40px));--nav:74px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--text);background:#fff;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei","PingFang SC",Arial,sans-serif;line-height:1.72;overflow-x:hidden}body.panel-open{overflow:hidden}a{text-decoration:none;color:inherit}button,input{font:inherit}.wrap{width:var(--wrap);margin:auto}.skip-link{position:fixed;top:-60px;left:16px;z-index:999;background:#fff;padding:9px 14px;border-radius:10px}.skip-link:focus{top:10px}.site-header{position:sticky;top:0;z-index:120;height:var(--nav);background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}.desktop-nav{height:100%;display:grid;grid-template-columns:minmax(230px,1fr) auto minmax(210px,1fr);align-items:center;gap:18px}.brand-lockup{display:flex;align-items:center;gap:10px}.brand-logo{display:block;max-width:138px;max-height:40px;width:auto;height:auto}.brand-word{color:var(--blue);font-weight:900;font-size:23px}.brand-tagline{padding:4px 8px;border-radius:999px;background:var(--bg3);color:var(--blue3);font-size:12px;white-space:nowrap}.primary-nav,.nav-actions{display:flex;align-items:center;gap:4px}.primary-nav a,.nav-actions a,.nav-actions button{min-height:44px;padding:0 11px;display:flex;align-items:center;border-radius:12px;border:0;background:transparent;white-space:nowrap;cursor:pointer}.primary-nav a:hover,.primary-nav a.is-current{background:var(--bg3);color:var(--blue);font-weight:800}.nav-actions{justify-content:flex-end}.nav-actions .blue{background:var(--blue);color:#fff}.mobile-nav{display:none;height:100%;grid-template-columns:70px 1fr 70px;align-items:center}.mobile-nav button,.mobile-nav>a:last-child{min-height:44px;border:0;background:none;color:var(--blue);font-weight:800;display:flex;align-items:center;justify-content:center}.mobile-brand{justify-self:center;max-width:150px}.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--blue);font-size:13px;font-weight:800;letter-spacing:.06em}.eyebrow:before{content:"";width:8px;height:8px;border-radius:50%;background:var(--blue2)}h1,h2,h3{color:var(--ink);line-height:1.24;margin-top:0}h1{font-size:clamp(36px,5vw,64px);letter-spacing:-.04em}h2{font-size:22px}h3{font-size:18px}p{margin:0 0 16px}.lead{font-size:18px;color:#536071;max-width:880px}.page-intro{padding:62px 0 34px}.intro-grid{display:grid;grid-template-columns:1.5fr .7fr;gap:38px;align-items:end}.intro-note{border-left:3px solid var(--blue);padding-left:18px;color:var(--muted)}.section{padding:72px 0}.section-tight{padding:42px 0}.section-blue{background:var(--bg2)}.cards,.magazine{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.card,.principle{padding:26px;border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:0 8px 28px rgba(21,67,118,.04)}.card h2,.principle h2{font-size:22px}.meta{display:flex;gap:8px;margin-bottom:12px}.card-index{font-size:12px;color:var(--blue);font-weight:900}.pill{display:inline-flex;padding:5px 10px;border-radius:999px;background:var(--bg3);color:var(--blue3);font-size:12px;font-weight:800}.text-link{display:inline-flex;gap:7px;color:var(--blue);font-weight:800}.text-link:after{content:"→"}.content-list{border-top:1px solid var(--line)}.content-item{display:grid;grid-template-columns:210px 1fr auto;gap:24px;padding:28px 0;border-bottom:1px solid var(--line);align-items:start}.content-item p{margin:0}.story-entry{display:grid;grid-template-columns:260px 1fr;gap:32px;padding:32px 0;border-top:1px solid var(--line)}.story-entry:first-child{border-top:0}.story-kicker{color:var(--blue);font-size:13px;font-weight:800}.steps{display:grid;gap:16px;counter-reset:step}.step{counter-increment:step;display:grid;grid-template-columns:58px 1fr;gap:18px;padding:24px;border:1px solid var(--line);border-radius:18px;background:#fff}.step:before{content:counter(step,decimal-leading-zero);width:48px;height:48px;display:flex;align-items:center;justify-content:center;border-radius:14px;background:var(--bg3);color:var(--blue);font-weight:900}.principle-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.hero-editor{padding:40px 0 30px;background:linear-gradient(180deg,var(--bg2),#fff)}.hero-editor-grid{display:grid;grid-template-columns:.9fr 1.4fr .9fr;gap:20px}.editor-pane{padding:28px;border:1px solid var(--line);border-radius:22px;background:#fff;box-shadow:var(--shadow)}.editor-pane.primary{display:flex;flex-direction:column;justify-content:space-between}.hero-actions{display:flex;gap:14px;align-items:center;flex-wrap:wrap;margin-top:24px}.primary-btn{display:inline-flex;min-height:48px;align-items:center;justify-content:center;padding:0 20px;border-radius:13px;background:linear-gradient(135deg,#3A96FF,#1478F2 55%,#0863D3);color:#fff;font-weight:800}.banner-pane{min-height:460px;border-radius:24px;overflow:hidden;background:var(--bg3);border:1px solid var(--bline)}.banner-pane img{display:block;width:100%;height:100%;min-height:460px;object-fit:contain}.banner-fallback{min-height:460px;padding:38px;display:flex;flex-direction:column;justify-content:flex-end;background:linear-gradient(145deg,#1478F2,#075DC9);color:#fff}.banner-fallback h2{font-size:42px;color:#fff}.quick-links{display:grid;gap:12px}.quick-link{padding:16px;border-radius:14px;background:var(--bg2)}.channel-strip{overflow-x:auto;border-bottom:1px solid var(--line)}.channel-strip .wrap{display:flex;min-width:max-content;gap:26px;padding:14px 0}.channel-strip a{font-size:14px;color:var(--muted)}.overview-grid{display:grid;grid-template-columns:1.2fr .8fr 1fr 1.3fr;gap:14px}.overview-item{padding:24px;border:1px solid var(--line);border-radius:18px;background:#fff}.topic-feature{display:grid;grid-template-columns:1.15fr .85fr;gap:22px}.topic-main{padding:32px;border-radius:22px;background:var(--ink);color:#EAF3FF}.topic-main h2{color:#fff;font-size:34px}.topic-side{display:grid;grid-template-columns:1fr 1fr;gap:14px}.topic-mini{padding:18px;border:1px solid var(--line);border-radius:16px;background:#fff}.city-map{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.city-node{padding:23px;border:1px solid var(--line);border-radius:18px}.tag-wall{display:flex;flex-wrap:wrap;gap:12px}.interest-tag{flex:1 1 240px;padding:22px;border:1px solid var(--bline);border-radius:18px;background:linear-gradient(160deg,#fff,var(--bg2))}.qa-list{display:grid;gap:14px}.qa-item{padding:22px;border:1px solid var(--line);border-radius:16px}.waterfall{columns:3 260px;column-gap:16px}.waterfall .card{break-inside:avoid;margin-bottom:16px}.app-showcase{display:grid;grid-template-columns:1fr .8fr;gap:40px;align-items:center}.app-visual{min-height:420px;display:flex;align-items:center;justify-content:center;padding:28px;border-radius:24px;background:var(--bg3)}.app-visual img{max-width:100%;max-height:520px;width:auto;height:auto}.app-fallback{width:min(320px,90%);aspect-ratio:9/16;border:10px solid var(--ink);border-radius:34px;background:#fff;display:flex;align-items:center;justify-content:center;color:var(--blue);font-weight:900;font-size:28px;text-align:center}.service-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.service-grid div{padding:16px;border:1px solid var(--line);border-radius:14px;background:#fff}.security-duo{display:grid;grid-template-columns:1fr 1fr;gap:22px}.security-block{padding:30px;border:1px solid var(--line);border-radius:20px}.security-block:nth-child(2){background:var(--bg3);transform:translateY(28px)}.faq-stack{display:grid;gap:12px}.faq-stack details{padding:0 20px;border:1px solid var(--line);border-radius:16px;background:#fff}.faq-stack summary{cursor:pointer;padding:18px 0;color:var(--ink);font-weight:800}.faq-stack p{padding-bottom:18px}.brand-declaration{padding:68px 0;background:#0B1F38;color:#EAF3FF}.brand-declaration h2{color:#fff;font-size:40px;max-width:820px}.brand-declaration p{max-width:920px;color:#C9D9ED}.site-footer{padding:62px 0 calc(28px + env(safe-area-inset-bottom));background:#0B1F38;color:#EAF3FF}.footer-grid{display:grid;grid-template-columns:1.1fr 2fr;gap:56px}.footer-brand{display:flex;align-items:center;gap:14px;margin-bottom:18px}.footer-brand img{max-width:140px;max-height:42px}.footer-brand strong{display:block;color:#fff;font-size:22px}.footer-brand small{display:block;color:#AFC5DF}.footer-links{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}.footer-links h2{font-size:14px;color:#fff}.footer-links a{display:block;color:#BDD0E7;font-size:14px;padding:5px 0}.footer-note{margin-top:36px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);color:#AFC3DA;font-size:13px}.footer-bottom{display:flex;justify-content:space-between;margin-top:18px;color:#92ABC6;font-size:12px}.site-overlay{position:fixed;inset:0;z-index:180;background:rgba(11,31,56,.42);opacity:0;visibility:hidden;pointer-events:none}.site-overlay.is-open{opacity:1;visibility:visible;pointer-events:auto}.channel-menu,.search-panel{position:fixed;z-index:190;left:0;right:0;top:var(--nav);max-height:calc(100dvh - var(--nav));overflow:auto;background:#fff;box-shadow:0 24px 60px rgba(11,31,56,.18);opacity:0;visibility:hidden;pointer-events:none;transform:translateY(-18px);transition:.2s}.channel-menu.is-open,.search-panel.is-open{opacity:1;visibility:visible;pointer-events:auto;transform:none}.panel-inner{padding:28px 0 34px}.panel-heading{display:flex;justify-content:space-between;gap:20px;align-items:start}.panel-heading button{min-height:44px;border:1px solid var(--line);background:#fff;border-radius:12px;padding:0 14px}.channel-columns{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}.channel-columns h3{color:var(--blue);font-size:14px}.channel-columns a{display:block;padding:10px 0;border-top:1px solid var(--line)}.channel-columns a strong,.channel-columns a span{display:block}.channel-columns a span{color:var(--muted);font-size:12px}.search-input{width:100%;height:58px;border:1px solid var(--bline);border-radius:16px;padding:0 18px;font-size:18px}.search-tags{padding:16px 0}.search-tags button{border:0;background:var(--bg3);color:var(--blue3);padding:7px 11px;border-radius:999px;margin:0 6px 6px 0}.search-results{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.search-results a{padding:14px;border:1px solid var(--line);border-radius:14px;color:var(--ink);font-weight:800}.search-results a span{display:block;color:var(--muted);font-weight:400;font-size:12px}.search-results a[hidden]{display:none}.mobile-bottom-nav{display:none}:focus-visible{outline:3px solid rgba(20,120,242,.35);outline-offset:3px}@media(max-width:1000px){:root{--nav:62px;--wrap:min(100% - 30px,1280px)}.desktop-nav{display:none}.mobile-nav{display:grid}.intro-grid,.topic-feature,.app-showcase,.security-duo,.footer-grid{grid-template-columns:1fr}.hero-editor-grid{grid-template-columns:1fr}.banner-pane,.banner-pane img,.banner-fallback{min-height:300px}.overview-grid,.cards,.magazine{grid-template-columns:1fr 1fr}.city-map{grid-template-columns:1fr 1fr}.principle-grid{grid-template-columns:1fr}.security-block:nth-child(2){transform:none}.footer-links{grid-template-columns:1fr 1fr}.channel-menu{left:auto;top:0;bottom:0;width:min(88vw,390px);max-height:none;transform:translateX(100%)}.channel-menu.is-open{transform:none}.channel-menu .panel-inner{width:auto;padding:20px 18px 90px}.channel-columns{grid-template-columns:1fr}.search-panel{top:0;bottom:0;max-height:none}.search-panel .panel-inner{padding:20px 15px 90px}.search-results{grid-template-columns:1fr}.mobile-bottom-nav{position:fixed;z-index:130;left:0;right:0;bottom:0;display:grid;grid-template-columns:repeat(5,1fr);padding-bottom:env(safe-area-inset-bottom);background:rgba(255,255,255,.97);border-top:1px solid var(--line)}.mobile-bottom-nav a{min-height:54px;display:flex;align-items:center;justify-content:center;font-size:12px}.mobile-bottom-nav a.is-current{color:var(--blue);font-weight:900}.site-footer{padding-bottom:calc(86px + env(safe-area-inset-bottom))}}@media(max-width:640px){h1{font-size:38px}.section{padding:48px 0}.overview-grid,.cards,.magazine,.city-map,.topic-side,.service-grid{grid-template-columns:1fr}.content-item,.story-entry{grid-template-columns:1fr;gap:8px}.waterfall{columns:1}.footer-bottom{flex-direction:column;gap:8px}.primary-btn{width:100%}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}

/* APP、搜索与通用辅助排版 */
.app-intro{width:var(--wrap);margin:auto;display:grid;grid-template-columns:1.05fr .95fr;gap:34px;align-items:center}.inline-actions{display:flex;gap:14px;align-items:center;flex-wrap:wrap;margin-top:22px}.btn-primary{display:inline-flex;min-height:48px;align-items:center;justify-content:center;padding:0 20px;border-radius:13px;background:linear-gradient(135deg,#3A96FF 0%,#1478F2 55%,#0863D3 100%);color:#fff;font-weight:800}.feature-grid{display:grid;gap:16px}.feature-grid.four-cols{grid-template-columns:repeat(4,1fr)}.soft-card{padding:22px;border:1px solid var(--line);border-radius:17px;background:#fff}.soft-card h3{font-size:19px}.split-info{display:grid;grid-template-columns:1fr 1fr;gap:22px}.split-info>article{padding:28px;border:1px solid var(--line);border-radius:19px;background:#fff}.visual-fallback{width:min(330px,92%);min-height:360px;padding:30px;border-radius:28px;background:linear-gradient(160deg,#1478F2,#075DC9);display:flex;flex-direction:column;justify-content:flex-end;gap:10px;color:#fff;box-shadow:0 16px 42px rgba(20,120,242,.15)}.visual-fallback strong{font-size:25px}.inline-links{display:flex;gap:16px;flex-wrap:wrap}.inline-links a{color:var(--blue);font-weight:800}.search-group{padding-top:15px}.search-group h3{margin:0 0 7px;font-size:13px;color:var(--muted);letter-spacing:.04em}.search-quick-links{display:flex;gap:8px;flex-wrap:wrap}.search-quick-links a{display:inline-flex;min-height:38px;align-items:center;padding:0 12px;border:1px solid var(--line);border-radius:999px;background:#fff;color:var(--ink);font-size:13px;font-weight:700}@media(max-width:1000px){.app-intro,.split-info{grid-template-columns:1fr}.feature-grid.four-cols{grid-template-columns:1fr 1fr}}@media(max-width:640px){.feature-grid.four-cols{grid-template-columns:1fr}.app-intro{width:var(--wrap)}.inline-actions .btn-primary{width:100%}}