:root{--blue:#1478F2;--blue2:#2F8CFF;--deep:#075DC9;--dark:#172033;--text:#3E4859;--muted:#6F7A89;--faint:#98A1AF;--bg:#fff;--soft:#F7FAFF;--pale:#EDF5FF;--gray:#F5F6F8;--line:rgba(20,120,242,.12);--gline:rgba(30,50,70,.08);--shadow:0 14px 38px rgba(21,67,118,.08);--bshadow:0 16px 42px rgba(20,120,242,.15);--r:18px;--max:1280px;--nav:74px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#fff;color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.75;overflow-x:hidden}a{color:inherit;text-decoration:none}img{max-width:100%;height:auto}button,input{font:inherit}button{cursor:pointer}.shell{width:min(calc(100% - 40px),var(--max));margin-inline:auto}.site-header{position:sticky;top:0;z-index:80;height:var(--nav);background:rgba(255,255,255,.97);backdrop-filter:blur(14px);border-bottom:1px solid var(--gline)}.desktop-nav{height:100%;display:flex;align-items:center;gap:22px}.brand-wrap{display:flex;align-items:center;gap:10px;min-width:240px}.brand{min-height:44px;display:flex;align-items:center}.brand-logo{display:block;max-width:142px;max-height:44px;object-fit:contain}.brand-text{font-size:22px;color:var(--blue);font-weight:800}.brand-tag{white-space:nowrap;font-size:12px;color:var(--deep);background:var(--pale);padding:4px 9px;border-radius:99px}.main-nav{display:flex;justify-content:center;gap:4px;flex:1;white-space:nowrap}.main-nav a,.nav-btn{min-height:44px;display:inline-flex;align-items:center;justify-content:center;border-radius:12px;padding:0 11px}.main-nav a{font-size:15px;color:#536071}.main-nav a:hover,.main-nav a.is-active{color:var(--blue);background:var(--pale)}.nav-actions{display:flex;gap:6px}.nav-btn{border:1px solid var(--gline);background:#fff;font-size:14px}.nav-btn:hover{color:var(--blue);background:var(--soft)}.mobile-nav{display:none;height:100%;align-items:center;justify-content:space-between}.mobile-btn{min-width:48px;min-height:44px;border:0;background:transparent;color:var(--blue);font-weight:700}.mobile-brand{max-width:54%;display:flex;justify-content:center}main{min-height:60vh}.section{padding:72px 0}.section-sm{padding:46px 0}.soft{background:var(--soft)}.pale{background:var(--pale)}h1,h2,h3{margin-top:0;color:var(--dark);line-height:1.28}h1{font-size:clamp(34px,5vw,62px);letter-spacing:-.03em}h2{font-size:clamp(25px,3vw,36px)}h3{font-size:18px}p{margin:0 0 1em}.lead{font-size:18px;color:#526074;max-width:760px}.muted{color:var(--muted)}.eyebrow{display:inline-flex;align-items:center;gap:7px;color:var(--blue);font-size:13px;font-weight:800;letter-spacing:.06em}.eyebrow:before{content:"";width:8px;height:8px;border-radius:50%;background:var(--blue)}.section-head{display:flex;justify-content:space-between;align-items:end;gap:22px;margin-bottom:28px}.card{background:#fff;border:1px solid var(--gline);border-radius:var(--r);box-shadow:var(--shadow)}.card-pad{padding:24px}.tag{display:inline-flex;padding:4px 10px;border-radius:99px;background:var(--pale);color:var(--deep);font-size:13px;margin:0 6px 7px 0}.text-link{display:inline-flex;gap:6px;color:var(--blue);font-weight:800}.text-link:after{content:"→"}.btn-primary,.btn-secondary{display:inline-flex;min-height:46px;align-items:center;justify-content:center;padding:0 19px;border-radius:13px;font-weight:800}.btn-primary{color:#fff;background:linear-gradient(135deg,#3A96FF 0%,#1478F2 55%,#0863D3 100%);box-shadow:var(--bshadow)}.btn-secondary{color:var(--blue);background:#fff;border:1px solid var(--line)}.button-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.page-intro{padding:60px 0 28px}.intro-grid{display:grid;grid-template-columns:1.35fr .65fr;gap:32px;align-items:end}.intro-note{padding:20px;background:var(--pale);border-radius:16px}.hero-editor{padding:36px 0 28px}.editor-grid{display:grid;grid-template-columns:.9fr 1.45fr .9fr;gap:18px}.editor-left,.editor-right,.editor-center{border-radius:22px}.editor-left{padding:28px;border:1px solid var(--gline);background:linear-gradient(180deg,var(--soft),#fff)}.editor-left h1{font-size:clamp(34px,4vw,52px);margin:14px 0 18px}.editor-center{min-height:500px;position:relative;overflow:hidden;background:linear-gradient(145deg,#0d6ddc,#2f8cff 55%,#d9eafe);box-shadow:var(--bshadow)}.editor-center img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain}.banner-fallback{position:absolute;inset:0;padding:38px;color:#fff;display:flex;flex-direction:column;justify-content:end;background:radial-gradient(circle at 70% 25%,rgba(255,255,255,.32),transparent 25%)}.banner-fallback strong{font-size:44px}.editor-right{padding:18px;border:1px solid var(--gline);display:grid;gap:11px}.mini-entry{padding:16px;border-radius:14px;background:var(--soft)}.mini-entry:hover{background:var(--pale)}.mini-entry h3{margin-bottom:5px}.mini-entry p{font-size:14px;color:var(--muted);margin-bottom:5px}.channel-strip{display:flex;gap:10px;overflow-x:auto;padding:13px 0}.channel-strip a{flex:0 0 auto;padding:8px 12px;border-radius:9px}.channel-strip a:hover{background:var(--pale);color:var(--blue)}.overview-grid{display:grid;grid-template-columns:1.25fr .9fr 1.1fr .8fr;gap:16px}.overview-grid article{padding:22px}.discussion-layout{display:grid;grid-template-columns:1.2fr 1.8fr;gap:20px}.topic-main{padding:28px;background:#0B1F38;color:#eaf3ff}.topic-main h2{color:#fff}.topic-list{display:grid;grid-template-columns:1fr 1fr;gap:13px}.topic-list article{padding:19px}.city-map{display:grid;grid-template-columns:1.2fr .8fr 1fr;gap:15px}.city-map article{padding:21px;min-height:190px}.city-map article:first-child{grid-row:span 2;background:var(--pale)}.city-map article:nth-child(4){grid-column:span 2}.life-grid,.discover-wall{columns:3 260px;column-gap:17px}.life-note,.discover-item{break-inside:avoid;padding:21px;margin-bottom:17px}.route-list{display:grid;grid-template-columns:repeat(6,minmax(230px,1fr));gap:13px;overflow-x:auto;padding-bottom:8px}.route-step{padding:21px;min-height:285px}.route-step:before{content:attr(data-step);display:flex;width:34px;height:34px;border-radius:50%;background:var(--blue);color:#fff;align-items:center;justify-content:center;font-weight:800;margin-bottom:16px}.interest-wall{display:flex;flex-wrap:wrap;gap:13px}.interest-chip{flex:1 1 230px;padding:21px;border:1px solid var(--gline);border-radius:18px;background:#fff}.interest-chip:nth-child(3n){flex-basis:330px;background:var(--pale)}.qa-list{display:grid;gap:13px}.qa-item{padding:22px;display:grid;grid-template-columns:48px 1fr;gap:17px}.q-mark{width:48px;height:48px;border-radius:15px;background:var(--pale);color:var(--blue);display:flex;align-items:center;justify-content:center;font-weight:900}.story-feature{display:grid;grid-template-columns:1.2fr .8fr;gap:20px}.story-main{padding:32px}.story-side{display:grid;gap:13px}.story-side article{padding:20px}.topic-index{display:grid;grid-template-columns:1fr 1fr;gap:17px}.topic-index article,.guide-index article,.privacy-cats article,.contact-path article{padding:23px}.guide-index{display:grid;grid-template-columns:repeat(3,1fr);gap:17px}.principles{counter-reset:r}.principle{counter-increment:r;display:grid;grid-template-columns:66px 1fr;gap:17px;padding:23px 0;border-bottom:1px solid var(--gline)}.principle:before{content:"0" counter(r);font-size:28px;font-weight:900;color:var(--blue)}.notice-list,.help-list,.rule-list{display:grid;gap:10px}.notice-row,.help-row,.rule-row{padding:21px;background:#fff;border-bottom:1px solid var(--gline)}.app-hero{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:center}.app-visual{min-height:460px;border-radius:28px;background:var(--pale);padding:22px;display:flex;align-items:center;justify-content:center;overflow:hidden}.app-visual img{max-height:410px;object-fit:contain}.phone-fallback{width:225px;height:410px;border-radius:36px;background:linear-gradient(180deg,#1478f2,#084a9c);border:9px solid #172033;color:#fff;text-align:center;padding:36px 18px}.install-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.install-step{padding:22px}.risk-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:20px}.risk-list{display:grid;gap:11px}.risk-item{padding:17px;border-left:4px solid var(--blue);background:#fff}.privacy-cats{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.rule-directory{display:grid;grid-template-columns:250px 1fr;gap:24px}.rule-nav{position:sticky;top:96px;align-self:start;padding:17px}.rule-nav a{display:block;padding:9px 11px;border-radius:9px}.rule-nav a:hover{background:var(--pale);color:var(--blue)}.help-categories{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}.help-card{padding:21px}.faq-list{display:grid;gap:11px}.faq-list details{border:1px solid var(--gline);border-radius:15px;background:#fff;padding:0 19px}.faq-list summary{cursor:pointer;padding:17px 0;font-weight:800;color:var(--dark)}.faq-list p{padding-bottom:17px}.contact-path{display:grid;grid-template-columns:1fr 1fr;gap:17px}.split-feature{display:grid;grid-template-columns:1fr 1fr;gap:20px}.feature-panel{padding:28px}.warning-box{padding:22px;border-radius:16px;background:var(--soft);border:1px solid var(--line)}.brand-declaration{padding:48px;border-radius:26px;background:linear-gradient(135deg,#0B1F38,#084A9C);color:#eaf3ff}.brand-declaration h2{color:#fff}.site-footer{background:#0B1F38;color:#EAF3FF;padding:56px 0 28px}.footer-grid{display:grid;grid-template-columns:1.1fr 1.9fr;gap:40px}.footer-brand-line{display:flex;align-items:center;gap:13px;margin-bottom:16px}.footer-logo{max-width:120px;max-height:42px;object-fit:contain}.footer-brand strong{display:block;font-size:20px}.footer-brand span{display:block;font-size:11px;letter-spacing:.14em;color:#9cc9ff}.footer-brand p,.footer-note{color:#b9c9dc}.footer-links{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}.footer-links h2{font-size:14px;color:#fff}.footer-links a{display:block;padding:4px 0;color:#c9d8e9;font-size:14px}.footer-note{margin-top:30px;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);font-size:14px}.copyright{padding-top:16px;color:#7f94aa;font-size:13px}.mobile-bottom{display:none}.overlay{position:fixed;inset:0;z-index:90;background:rgba(9,25,45,.42);opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.overlay.is-open{opacity:1;visibility:visible;pointer-events:auto}.mega-menu,.search-panel{position:fixed;left:0;right:0;top:var(--nav);z-index:100;background:#fff;box-shadow:0 30px 70px rgba(4,30,65,.18);visibility:hidden;pointer-events:none;opacity:0;transform:translateY(-14px);transition:.2s;max-height:calc(100vh - var(--nav));overflow:auto}.mega-menu.is-open,.search-panel.is-open{visibility:visible;pointer-events:auto;opacity:1;transform:none}.panel-open{overflow:hidden}.panel-head{display:flex;justify-content:space-between;align-items:center;gap:20px;padding-top:19px;padding-bottom:15px}.panel-head strong{display:block;font-size:20px;color:var(--dark)}.panel-head span{display:block;font-size:13px;color:var(--muted)}.panel-head button{min-height:44px;padding:0 15px;border:1px solid var(--gline);border-radius:11px;background:#fff}.mega-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;padding-bottom:26px}.mega-grid section{border-top:2px solid var(--blue);padding-top:13px}.mega-grid h2{font-size:16px}.mega-grid a{display:block;padding:9px 0}.mega-grid b{display:block;color:var(--dark)}.mega-grid span{display:block;color:var(--muted);font-size:13px}.search-inner{padding-bottom:26px}.search-box{display:block;color:var(--muted);font-size:13px}.search-box input{display:block;width:100%;height:56px;padding:0 17px;margin-top:8px;border:1px solid var(--line);border-radius:15px;outline:none}.search-box input:focus{border-color:var(--blue);box-shadow:0 0 0 4px rgba(20,120,242,.09)}.search-chips{display:flex;gap:8px;flex-wrap:wrap;margin:15px 0}.search-chips span{padding:8px 0;margin-right:6px;color:var(--muted)}.search-chips button{border:0;background:var(--pale);color:var(--deep);padding:8px 11px;border-radius:99px}.search-links{display:grid;grid-template-columns:repeat(4,1fr);gap:9px}.search-links a{padding:15px;background:var(--soft);border-radius:12px}.search-links span{display:block;color:var(--muted);font-size:13px}.search-links a[hidden]{display:none}a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid rgba(20,120,242,.32);outline-offset:3px}
@media(max-width:1050px){.brand-wrap{min-width:150px}.brand-tag{display:none}.main-nav a{padding:0 8px;font-size:14px}.overview-grid{grid-template-columns:1fr 1fr}.editor-grid{grid-template-columns:1fr 1.2fr}.editor-right{grid-column:1/-1;grid-template-columns:repeat(4,1fr)}.grid-4,.help-categories{grid-template-columns:1fr 1fr}.guide-index,.privacy-cats{grid-template-columns:1fr 1fr}.footer-grid{grid-template-columns:1fr}}
@media(max-width:800px){:root{--nav:64px}.shell{width:min(calc(100% - 30px),var(--max))}.desktop-nav{display:none}.mobile-nav{display:flex}.site-header{height:var(--nav)}.section{padding:52px 0}.section-sm{padding:34px 0}.section-head{align-items:start;flex-direction:column}.page-intro{padding:40px 0 22px}.intro-grid,.editor-grid,.discussion-layout,.story-feature,.app-hero,.risk-grid,.rule-directory,.split-feature{grid-template-columns:1fr}.editor-center{min-height:350px}.editor-right{grid-template-columns:1fr 1fr}.overview-grid,.grid-3{grid-template-columns:1fr 1fr}.topic-list,.topic-index,.contact-path{grid-template-columns:1fr}.city-map{grid-template-columns:1fr 1fr}.city-map article:first-child{grid-column:1/-1;grid-row:auto}.city-map article:nth-child(4){grid-column:auto}.life-grid,.discover-wall{columns:2 240px}.install-steps{grid-template-columns:1fr 1fr}.rule-nav{position:static}.footer-links{grid-template-columns:1fr 1fr}.mega-menu{top:0;left:auto;width:min(88vw,420px);height:100vh;max-height:100vh;transform:translateX(100%)}.mega-menu.is-open{transform:none}.mega-grid{grid-template-columns:1fr}.search-panel{top:0;bottom:0;max-height:none}.search-links{grid-template-columns:1fr}.mobile-bottom{display:grid;grid-template-columns:repeat(5,1fr);position:fixed;left:0;right:0;bottom:0;z-index:70;background:rgba(255,255,255,.98);border-top:1px solid var(--gline);padding-bottom:env(safe-area-inset-bottom)}.mobile-bottom a{min-height:54px;display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:13px}.mobile-bottom a.is-active{color:var(--blue);font-weight:800}.site-footer{padding-bottom:calc(80px + env(safe-area-inset-bottom))}.brand-declaration{padding:34px}}
@media(max-width:560px){h1{font-size:36px}.lead{font-size:16px}.grid-2,.grid-3,.grid-4,.overview-grid,.guide-index,.privacy-cats,.help-categories,.install-steps{grid-template-columns:1fr}.editor-right{grid-template-columns:1fr}.life-grid,.discover-wall{columns:1}.city-map{grid-template-columns:1fr}.city-map article:first-child,.city-map article:nth-child(4){grid-column:auto}.route-list{grid-template-columns:repeat(6,82vw)}.footer-links{grid-template-columns:1fr 1fr;gap:16px}.qa-item{grid-template-columns:40px 1fr;padding:18px}.q-mark{width:40px;height:40px}.brand-declaration{padding:27px 22px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
/* 首页编辑台与专题区域 */
.home-editor{padding:36px 0 30px}.home-editor .editor-grid{display:grid;grid-template-columns:.92fr 1.46fr .86fr;gap:18px;align-items:stretch}.editor-intro,.editor-side{border:1px solid var(--gline);border-radius:22px;background:#fff}.editor-intro{padding:28px;background:linear-gradient(180deg,var(--soft),#fff)}.editor-intro h1{font-size:clamp(34px,4vw,54px);margin:14px 0 18px}.editor-visual{min-height:500px;position:relative;overflow:hidden;border-radius:22px;background:linear-gradient(145deg,#0d6ddc,#2f8cff 55%,#d9eafe);box-shadow:var(--bshadow)}.editor-visual img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain}.visual-fallback{position:absolute;inset:0;padding:38px;color:#fff;display:flex;flex-direction:column;justify-content:flex-end;background:radial-gradient(circle at 70% 25%,rgba(255,255,255,.32),transparent 25%)}.visual-fallback span{font-size:12px;letter-spacing:.16em;opacity:.9}.visual-fallback strong{font-size:clamp(30px,4vw,48px);line-height:1.18;max-width:10em;margin:10px 0}.visual-fallback small{font-size:14px}.editor-side{padding:18px;display:grid;gap:11px}.side-entry{display:block;padding:16px;border-radius:14px;background:var(--soft)}.side-entry:hover{background:var(--pale)}.side-entry strong,.side-entry span{display:block}.side-entry strong{color:var(--dark)}.side-entry span{color:var(--muted);font-size:14px;margin-top:4px}.channel-strip{border-top:1px solid var(--gline);border-bottom:1px solid var(--gline);background:#fff}.strip-inner{display:flex;gap:10px;overflow-x:auto;padding:12px 0;scrollbar-width:thin}.strip-inner a{flex:0 0 auto;padding:7px 11px;border-radius:9px;color:#526074}.strip-inner a:hover{background:var(--pale);color:var(--blue)}.discussion-grid{display:grid;grid-template-columns:1.08fr 1.92fr;gap:20px}.lead-discussion{padding:28px;border-radius:20px;background:#0B1F38;color:#EAF3FF}.lead-discussion .text-link{color:#9cc9ff}.discussion-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}.discussion-list a{padding:18px;border-radius:15px;background:#fff;border:1px solid var(--gline)}.discussion-list strong,.discussion-list span{display:block}.discussion-list strong{color:var(--dark);margin-bottom:5px}.discussion-list span{font-size:14px;color:var(--muted)}.story-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:20px}.story-lead{padding:30px;border-radius:20px;background:#fff;border:1px solid var(--gline)}.story-list{display:grid;gap:12px}.story-list a{display:block;padding:18px;border:1px solid var(--gline);border-radius:15px;background:#fff}.story-list strong,.story-list span{display:block}.story-list strong{color:var(--dark);margin-bottom:5px}.story-list span{color:var(--muted);font-size:14px}.discover-columns{columns:3 270px;column-gap:17px}.discover-columns .content-card{break-inside:avoid;margin-bottom:17px}.content-card{padding:22px;border:1px solid var(--gline);border-radius:18px;background:#fff;box-shadow:var(--shadow)}.content-card .meta{display:inline-flex;padding:4px 9px;border-radius:99px;background:var(--pale);color:var(--deep);font-size:12px;margin-bottom:8px}.app-feature{display:grid;grid-template-columns:1.05fr .95fr;gap:32px;align-items:center}.app-copy>p{font-size:17px;color:#526074}.mini-services{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}.mini-services span{padding:7px 10px;border-radius:99px;background:var(--pale);color:var(--deep);font-size:13px}.safety-pair{display:grid;grid-template-columns:1fr 1fr;gap:20px}.safety-block,.privacy-block{padding:30px;border-radius:22px}.safety-block{background:#0B1F38;color:#dbe9f8}.safety-block h2{color:#fff}.safety-block .text-link{color:#9cc9ff}.privacy-block{background:var(--pale);border:1px solid var(--line)}.section-foot{margin-top:20px}.brand-statement{background:#0B1F38;color:#d9e8f7}.statement-inner{max-width:1000px;text-align:center}.brand-statement h2{color:#fff;font-size:clamp(30px,4vw,48px)}.brand-statement .eyebrow{color:#9cc9ff}.brand-statement .eyebrow:before{background:#9cc9ff}.light-link{color:#9cc9ff}.text-link:after{content:none}
@media(max-width:1000px){.home-editor .editor-grid{grid-template-columns:1fr 1.25fr}.editor-side{grid-column:1/-1;grid-template-columns:repeat(4,1fr)}.discussion-grid,.story-grid,.app-feature,.safety-pair{grid-template-columns:1fr}.discussion-list{grid-template-columns:repeat(3,1fr)}}
@media(max-width:800px){.home-editor{padding-top:26px}.home-editor .editor-grid{grid-template-columns:1fr}.editor-intro{order:1}.editor-visual{order:2;min-height:350px}.editor-side{order:3;grid-template-columns:1fr 1fr}.discussion-list{grid-template-columns:1fr 1fr}.discover-columns{columns:2 240px}}
@media(max-width:560px){.editor-side,.discussion-list{grid-template-columns:1fr}.discover-columns{columns:1}.visual-fallback{padding:25px}.safety-block,.privacy-block{padding:24px}}