:root{--bg:#fff;--soft:#F7FAFF;--pale:#EDF5FF;--ice:#E5F1FF;--deep:#0A315E;--footer:#071D37;--blue:#1677EE;--bright:#3395FF;--blue2:#075FC6;--darkblue:#08488D;--title:#16243A;--text:#3C485A;--muted:#6B7787;--note:#929BA8;--white:#fff;--light:#DCEEFF;--border:rgba(22,119,238,.12);--shadow:0 12px 34px rgba(30,72,120,.08);--brandshadow:0 14px 40px rgba(22,119,238,.14);--shell:min(1320px,calc(100% - 48px))}
*{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}img{display:block;max-width:100%}a{color:inherit;text-decoration:none}button,input{font:inherit}button{cursor:pointer}a,button,input{outline:none}a:focus-visible,button:focus-visible,input:focus-visible{box-shadow:0 0 0 3px rgba(22,119,238,.25);border-radius:12px}.shell{width:var(--shell);margin:auto}
.site-header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.95);backdrop-filter:blur(16px);border-bottom:1px solid var(--border)}.desktop-nav{height:74px;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:22px}.brand-island{display:flex;align-items:center;gap:10px;min-height:48px;padding:6px 14px 6px 8px;background:var(--soft);border:1px solid var(--border);border-radius:18px}.logo-slot,.mobile-logo,.footer-logo{display:grid;place-items:center;background:linear-gradient(145deg,#fff,var(--ice));border:1px solid var(--border);overflow:hidden}.logo-slot{width:40px;height:40px;border-radius:12px}.logo-slot.large{width:50px;height:50px}.logo-slot img,.mobile-logo img,.footer-logo img{width:100%;height:100%;object-fit:contain}.brand-name{font-weight:800;color:var(--title);white-space:nowrap}.category-nav,.nav-actions{display:flex;align-items:center;gap:4px;white-space:nowrap}.category-nav a,.nav-actions>a,.nav-actions button{min-height:44px;display:inline-flex;align-items:center;justify-content:center;padding:0 12px;border-radius:14px;color:var(--text);font-size:15px;border:0;background:transparent}.category-nav a.active,.nav-actions>a.active{background:var(--pale);color:var(--blue2);font-weight:700}.category-nav a.active:before,.nav-actions>a.active:before{content:"";width:6px;height:6px;border-radius:50%;background:var(--blue);margin-right:7px}.category-nav a:hover,.nav-actions>a:hover,.nav-actions button:hover{background:var(--soft);color:var(--blue2)}.mobile-nav{display:none;height:62px;grid-template-columns:72px 1fr 72px;align-items:center;padding:0 14px}.mobile-nav-btn{height:44px;border:0;background:transparent}.mobile-brand{justify-self:center;display:flex;align-items:center;gap:8px;font-weight:800;color:var(--title)}.mobile-logo{width:32px;height:32px;border-radius:10px}
.page-hero{padding:72px 0 42px;background:linear-gradient(180deg,var(--soft),#fff)}.page-hero .inner{width:min(900px,calc(100% - 48px));margin:auto}.eyebrow,.section-kicker{color:var(--blue2);font-weight:800;font-size:14px}.eyebrow{display:inline-flex;align-items:center;gap:8px;letter-spacing:.04em}.eyebrow:before{content:"";width:24px;height:3px;border-radius:999px;background:var(--blue)}.page-hero h1{margin:12px 0 14px;font-size:clamp(36px,4vw,46px);line-height:1.16;color:var(--title)}.page-hero p{margin:0;max-width:760px;font-size:17px;color:var(--muted)}.content-section{padding:64px 0}.content-section.alt{background:var(--soft)}.section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:28px}.section-head h2{margin:0;color:var(--title);font-size:clamp(28px,3vw,34px);line-height:1.2}.section-head p{margin:0;max-width:620px;color:var(--muted)}.prose{width:min(820px,calc(100% - 48px));margin:auto}.prose h2{font-size:28px;line-height:1.25;color:var(--title);margin:44px 0 14px}.prose h3{font-size:21px;color:var(--title);margin:32px 0 10px}.prose p{margin:0 0 18px;font-size:16px}
.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.story-card,.info-card,.topic-card,.index-item,.contact-card{border:1px solid var(--border);background:#fff;border-radius:22px;padding:24px;box-shadow:var(--shadow)}.story-card h3,.info-card h3,.topic-card h3,.index-item h2,.index-item h3,.contact-card h2{margin:0 0 10px;color:var(--title);line-height:1.35}.story-card p,.info-card p,.topic-card p,.index-item p,.contact-card p{margin:0;color:var(--muted);font-size:15px}.tag{display:inline-block;margin-bottom:10px;color:var(--blue2);font-size:13px;font-weight:800}.read-link{display:inline-flex;align-items:center;min-height:44px;margin-top:12px;color:var(--blue2);font-weight:800}.read-link:after{content:" →";margin-left:5px}
.hero-wrap{padding:26px 0 30px}.hero-banner{width:var(--shell);margin:auto;aspect-ratio:16/7;max-height:520px;position:relative;overflow:hidden;border-radius:28px;background:linear-gradient(135deg,#EAF4FF,#CFE5FF 48%,#F9FCFF);box-shadow:var(--brandshadow);border:1px solid var(--border)}.hero-banner:before{content:"HAI JIAO";position:absolute;right:5%;bottom:7%;font-size:clamp(46px,9vw,122px);font-weight:900;color:rgba(22,119,238,.08);letter-spacing:.08em}.hero-banner img{width:100%;height:100%;object-fit:contain;position:relative;z-index:1}.home-intro{width:var(--shell);margin:24px auto 0;display:grid;grid-template-columns:1.3fr .7fr;gap:24px;align-items:center}.home-intro h1{font-size:clamp(42px,5vw,56px);line-height:1.12;color:var(--title);margin:0}.home-intro p{margin:0;color:var(--muted)}.portal-grid{width:var(--shell);margin:24px auto 6px;display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.portal-grid a{min-height:88px;padding:18px;border-radius:20px;background:var(--soft);border:1px solid var(--border);display:flex;flex-direction:column;justify-content:center}.portal-grid strong{color:var(--title);font-size:18px}.portal-grid span{color:var(--muted);font-size:14px}
.editor-layout{display:grid;grid-template-columns:1.45fr .85fr .85fr;gap:18px}.editor-large{grid-row:span 2;background:linear-gradient(160deg,var(--deep),#11599f);color:#fff}.editor-large h3,.editor-large p,.editor-large .tag{color:#fff}.editor-stack{display:grid;gap:18px}.short-list{grid-column:1/-1;display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.city-feature{display:grid;grid-template-columns:55fr 45fr;gap:34px;align-items:center}.city-feature-image{aspect-ratio:4/3;overflow:hidden;border-radius:28px;background:linear-gradient(145deg,#DDEFFF,#F9FCFF);border:1px solid var(--border)}.city-feature-image img{width:100%;height:100%;object-fit:cover}.city-copy h2{font-size:34px;line-height:1.2;color:var(--title);margin:0 0 14px}.time-board{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.time-card{padding:24px;border-radius:22px;border:1px solid var(--border);background:#fff}.time-card b{display:block;color:var(--blue2);font-size:14px;margin-bottom:8px}.time-card h3{margin:0 0 8px;font-size:20px;color:var(--title)}
.route-line{display:grid;grid-template-columns:repeat(6,1fr);position:relative}.route-line:before{content:"";position:absolute;left:7%;right:7%;top:22px;height:2px;background:var(--border)}.route-step{position:relative;text-align:center;padding:0 10px}.route-step i{width:44px;height:44px;border-radius:50%;display:grid;place-items:center;background:#fff;border:2px solid var(--blue);color:var(--blue2);font-style:normal;font-weight:800;margin:0 auto 12px;position:relative;z-index:1}.route-step strong{display:block;color:var(--title)}.route-step span{font-size:13px;color:var(--muted)}.interest-cloud{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}.interest-cloud a{min-height:76px;padding:18px;border:1px solid var(--border);background:#fff;border-radius:18px;font-size:17px;font-weight:800;color:var(--title);display:flex;align-items:center;justify-content:center}.question-list{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.question-item{padding:24px 0;border-top:1px solid var(--border)}.question-item h3{margin:0 0 8px;color:var(--title);font-size:20px}.question-item p{margin:0;color:var(--muted)}
.feature-columns,.story-lead,.magazine-grid,.app-layout{display:grid;grid-template-columns:1.15fr .85fr;gap:28px}.long-feature{padding:30px;border-radius:24px;background:var(--deep);color:var(--light)}.long-feature h3{margin:0 0 12px;color:#fff;font-size:27px}.long-feature p{color:var(--light)}.story-main{padding:32px;border-radius:24px;background:var(--pale);border:1px solid var(--border)}.story-main h3{font-size:27px;color:var(--title);margin:0 0 12px}.story-mini,.side-notes{display:grid;gap:14px}.topic-grid,.guide-grid,.security-grid,.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.album-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:16px}.media-slot{position:relative;overflow:hidden;border:1px solid var(--border);border-radius:22px;background:linear-gradient(145deg,#E4F2FF,#fff);min-height:180px}.media-slot.wide{grid-row:span 2;min-height:410px}.media-slot.medium{min-height:196px}.media-slot.small{min-height:150px}.media-slot:after{content:"";position:absolute;inset:18%;border-radius:50%;background:radial-gradient(circle,rgba(22,119,238,.12),rgba(22,119,238,0) 70%)}.pulse-list{border-top:1px solid var(--border)}.pulse-row{display:grid;grid-template-columns:160px 1fr;gap:20px;padding:20px 0;border-bottom:1px solid var(--border)}.pulse-row strong{color:var(--blue2)}
.app-section{background:linear-gradient(135deg,#F7FAFF,#E7F3FF)}.app-layout{grid-template-columns:55fr 45fr;align-items:center;gap:36px}.app-preview-image{min-height:440px;max-height:520px;display:grid;place-items:center;background:linear-gradient(145deg,#D8EAFF,#fff);border:1px solid var(--border);border-radius:30px;overflow:hidden}.app-preview-image img{width:100%;height:100%;max-height:520px;object-fit:contain}.bullet-pills,.privacy-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}.bullet-pills span,.privacy-tags span{padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--border);font-size:14px;color:var(--text)}
.security-band{background:var(--deep);color:var(--light)}.security-band .section-head h2,.security-band h3{color:#fff}.security-band .section-head p,.security-band p{color:var(--light)}.security-item{padding:22px;border:1px solid rgba(255,255,255,.12);border-radius:20px;background:rgba(255,255,255,.05)}.privacy-box{border:1px solid var(--border);border-radius:24px;padding:28px;background:#fff}.index-wall{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.timeline{position:relative;padding-left:30px}.timeline:before{content:"";position:absolute;left:9px;top:6px;bottom:6px;width:2px;background:var(--border)}.timeline-item{position:relative;padding:0 0 26px 16px}.timeline-item:before{content:"";position:absolute;left:-27px;top:7px;width:12px;height:12px;border-radius:50%;background:var(--blue);box-shadow:0 0 0 5px var(--pale)}.principle-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.principle{padding:22px;border:1px solid var(--border);border-radius:20px;background:linear-gradient(180deg,#fff,var(--soft))}.principle strong{display:block;color:var(--title);font-size:18px;margin-bottom:7px}.notice{padding:18px 20px;border-left:4px solid var(--blue);background:var(--pale);border-radius:0 16px 16px 0}
details{border:1px solid var(--border);border-radius:18px;background:#fff;padding:0 20px;margin:12px 0}summary{cursor:pointer;list-style:none;padding:18px 36px 18px 0;font-weight:800;color:var(--title);position:relative}summary:after{content:"＋";position:absolute;right:0;top:15px;color:var(--blue2);font-size:20px}details[open] summary:after{content:"－"}details p{margin:0 0 18px;color:var(--muted)}
.site-footer{background:var(--footer);color:var(--light);padding:52px 0 calc(26px + env(safe-area-inset-bottom));border-top:1px solid rgba(220,238,255,.24)}.footer-grid{display:grid;grid-template-columns:1.8fr repeat(4,1fr);gap:30px}.footer-brand{max-width:410px}.footer-logo{width:48px;height:48px;border-radius:14px;margin-bottom:14px;background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.12)}.footer-brand strong{display:block;color:#fff;font-size:20px}.footer-brand em{font-size:12px;font-style:normal;color:var(--light);margin-left:5px}.footer-brand p{color:var(--light);font-size:14px}.footer-grid h2{font-size:15px;color:#fff;margin:0 0 10px}.footer-grid a{display:block;min-height:36px;color:var(--light);font-size:14px}.footer-bottom{display:flex;justify-content:space-between;gap:20px;align-items:center;padding-top:26px;margin-top:30px;border-top:1px solid rgba(255,255,255,.12);font-size:13px}.footer-bottom p{margin:0}.footer-bottom div{display:flex;gap:18px}
.overlay-panel{position:fixed;left:0;right:0;top:74px;z-index:90;background:#fff;border-bottom:1px solid var(--border);box-shadow:0 25px 60px rgba(7,29,55,.16);visibility:hidden;opacity:0;pointer-events:none;transform:translateY(-10px);transition:.2s}.overlay-panel.is-open{visibility:visible;opacity:1;pointer-events:auto;transform:none}.panel-shell{width:var(--shell);margin:auto;padding:26px 0 32px}.panel-head{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-bottom:24px}.menu-brand{display:flex;align-items:center;gap:12px}.menu-brand strong,.panel-head>div strong{display:block;color:var(--title);font-size:21px}.menu-brand small,.panel-head>div small{display:block;color:var(--muted)}.panel-close{min-width:64px;min-height:44px;border-radius:14px;border:1px solid var(--border);background:var(--soft)}.menu-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:22px}.menu-grid h2{font-size:14px;color:var(--blue2);margin:0 0 8px}.menu-grid a{display:flex;min-height:38px;align-items:center}.search-shell{max-width:900px}.search-box input{width:100%;height:56px;border:1px solid var(--border);border-radius:18px;padding:0 18px;background:var(--soft)}.search-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.search-links a{min-height:44px;display:flex;align-items:center;padding:0 14px;border:1px solid var(--border);border-radius:14px}.search-links a[hidden]{display:none}.page-overlay{position:fixed;inset:0;z-index:80;background:rgba(7,29,55,.36);backdrop-filter:blur(2px);visibility:hidden;opacity:0;pointer-events:none;transition:.2s}.page-overlay.is-open{visibility:visible;opacity:1;pointer-events:auto}body.panel-open{overflow:hidden}.mobile-bottom-nav{display:none}.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}
@media(max-width:1279px){:root{--shell:min(1180px,calc(100% - 36px))}.desktop-nav{gap:10px}.category-nav a,.nav-actions>a,.nav-actions button{padding:0 9px;font-size:14px}.brand-name{font-size:15px}.footer-grid{gap:20px}}
@media(max-width:1023px){.desktop-nav{display:none}.mobile-nav{display:grid}.overlay-panel{top:62px;max-height:calc(100vh - 62px);overflow:auto}.menu-grid{grid-template-columns:repeat(2,1fr)}.article-grid,.topic-grid,.guide-grid,.security-grid,.contact-grid{grid-template-columns:repeat(2,1fr)}.editor-layout{grid-template-columns:1.2fr .8fr}.time-board{grid-template-columns:repeat(2,1fr)}.interest-cloud{grid-template-columns:repeat(3,1fr)}.principle-grid{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:1.5fr repeat(2,1fr)}.footer-brand{grid-row:span 2}}
@media(max-width:767px){:root{--shell:calc(100% - 28px)}body{padding-bottom:58px}.page-hero{padding:48px 0 30px}.page-hero .inner,.prose{width:calc(100% - 28px)}.page-hero h1{font-size:clamp(28px,9vw,34px)}.page-hero p{font-size:15px}.content-section{padding:46px 0}.section-head{display:block}.section-head h2{font-size:26px}.hero-banner{aspect-ratio:16/10;border-radius:22px}.home-intro,.editor-layout,.short-list,.city-feature,.question-list,.feature-columns,.story-lead,.magazine-grid,.index-wall,.app-layout{grid-template-columns:1fr}.home-intro h1{font-size:clamp(30px,10vw,38px)}.portal-grid{grid-template-columns:repeat(2,1fr)}.article-grid,.topic-grid,.guide-grid,.security-grid,.contact-grid{grid-template-columns:1fr}.city-feature-image{order:-1}.route-line{grid-template-columns:repeat(3,1fr);gap:24px 0}.route-line:before{display:none}.interest-cloud{grid-template-columns:repeat(2,1fr)}.album-grid{grid-template-columns:1fr 1fr}.media-slot.wide{grid-column:1/-1;grid-row:auto;min-height:260px}.app-preview-image{min-height:360px}.app-preview-image img{max-width:320px}.pulse-row{grid-template-columns:1fr;gap:5px}.footer-grid{grid-template-columns:repeat(2,1fr)}.footer-brand{grid-column:1/-1;grid-row:auto}.footer-bottom{display:block}.footer-bottom div{margin-top:10px;flex-wrap:wrap}.mobile-bottom-nav{position:fixed;z-index:70;left:0;right:0;bottom:0;height:calc(58px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);display:grid;grid-template-columns:repeat(5,1fr);background:rgba(255,255,255,.96);border-top:1px solid var(--border);backdrop-filter:blur(14px)}.mobile-bottom-nav a{display:grid;place-items:center;font-size:13px;min-height:54px}}
@media(max-width:559px){.mobile-brand span:last-child{display:none}.portal-grid{grid-template-columns:1fr 1fr}.time-board,.principle-grid{grid-template-columns:1fr}.menu-grid{grid-template-columns:1fr}.route-line{grid-template-columns:repeat(2,1fr)}.album-grid{grid-template-columns:1fr}.media-slot.wide{grid-column:auto}.footer-grid{grid-template-columns:1fr}.footer-brand{grid-column:auto}}