*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#fff;color:#3e4859;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;line-height:1.72;overflow-x:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}button{cursor:pointer}img{max-width:100%;height:auto;display:block}h1,h2,h3,h4,p{margin-top:0}h1,h2,h3,h4{color:#172033;line-height:1.25}h1{font-size:clamp(34px,5vw,64px);letter-spacing:-.04em}h2{font-size:clamp(26px,3vw,40px);letter-spacing:-.025em}h3{font-size:20px}p{margin-bottom:1em}.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:14px;top:-80px;z-index:300;background:#1478f2;color:#fff;padding:10px 14px;border-radius:10px}.skip-link:focus{top:12px}.site-header{position:sticky;top:0;z-index:100;height:74px;background:rgba(255,255,255,.96);border-bottom:1px solid rgba(30,50,70,.08);backdrop-filter:blur(16px)}.nav-shell{max-width:1280px;height:100%;margin:0 auto;padding:0 22px;display:grid;grid-template-columns:minmax(235px,1fr) auto minmax(215px,1fr);align-items:center;gap:18px}.brand{display:flex;align-items:center;min-width:0}.brand img{max-width:124px;max-height:38px;object-fit:contain}.brand-word{font-weight:900;font-size:24px;color:#1478f2;white-space:nowrap}.brand-tag{margin-left:12px;padding:5px 9px;border-radius:999px;background:#edf5ff;color:#075dc9;font-size:12px;white-space:nowrap}.desktop-nav{display:flex;gap:4px;align-items:center;white-space:nowrap}.desktop-nav a,.nav-action{min-height:44px;display:inline-flex;align-items:center;justify-content:center;padding:0 11px;border-radius:12px;color:#526071;font-size:14px;font-weight:700;border:0;background:transparent}.desktop-nav a:hover,.nav-action:hover,.desktop-nav a.is-active,.nav-action.is-active{background:#edf5ff;color:#1478f2}.nav-actions{display:flex;justify-content:flex-end;gap:4px}.site-main{min-height:60vh}.shell{max-width:1280px;margin:0 auto;padding-left:22px;padding-right:22px}.section{padding:76px 0}.section-tight{padding:48px 0}.soft{background:#f7faff}.blue-soft{background:#edf5ff}.gray-soft{background:#f5f6f8}.eyebrow{display:inline-flex;align-items:center;gap:7px;color:#1478f2;font-weight:800;font-size:13px;letter-spacing:.08em;text-transform:uppercase}.eyebrow:before{content:"";width:8px;height:8px;border-radius:50%;background:#1478f2}.lead{max-width:760px;font-size:18px;color:#5f6c7c}.section-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:26px;margin-bottom:30px}.section-heading p{max-width:620px;margin-bottom:0}.text-link{display:inline-flex;align-items:center;gap:8px;color:#1478f2;font-weight:800}.text-link:after{content:"→";transition:transform .2s}.text-link:hover:after{transform:translateX(4px)}.primary-button{display:inline-flex;min-height:48px;align-items:center;justify-content:center;padding:0 20px;border-radius:14px;background:linear-gradient(135deg,#3a96ff 0%,#1478f2 55%,#0863d3 100%);color:#fff;font-weight:800;box-shadow:0 16px 42px rgba(20,120,242,.15)}.secondary-link{display:inline-flex;min-height:48px;align-items:center;color:#1478f2;font-weight:800}.button-row{display:flex;flex-wrap:wrap;align-items:center;gap:18px}.card{background:#fff;border:1px solid rgba(20,120,242,.12);border-radius:18px;box-shadow:0 14px 38px rgba(21,67,118,.08)}.tag{display:inline-flex;padding:5px 10px;border-radius:999px;background:#edf5ff;color:#075dc9;font-size:12px;font-weight:800}.hero-editor{padding:46px 0 28px}.hero-grid{display:grid;grid-template-columns:.85fr 1.45fr .9fr;gap:22px;align-items:stretch}.hero-intro,.hero-banner,.hero-side{border-radius:22px;min-height:470px}.hero-intro{padding:34px;background:#f7faff;border:1px solid rgba(20,120,242,.12);display:flex;flex-direction:column;justify-content:space-between}.hero-intro h1{font-size:clamp(34px,4.3vw,56px);margin:18px 0}.today-prompt{margin-top:30px;padding-top:22px;border-top:1px solid rgba(20,120,242,.12)}.today-prompt strong{display:block;color:#172033;margin-bottom:8px}.hero-banner{position:relative;overflow:hidden;background:linear-gradient(145deg,#1478f2,#075dc9);color:#fff;display:flex;align-items:flex-end;padding:34px;box-shadow:0 16px 42px rgba(20,120,242,.15)}.hero-banner img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;background:#1478f2}.hero-banner-fallback{position:absolute;inset:0;background:radial-gradient(circle at 74% 18%,rgba(255,255,255,.23),transparent 29%),radial-gradient(circle at 12% 75%,rgba(255,255,255,.12),transparent 30%)}.hero-banner-copy{position:relative;z-index:2;max-width:540px}.hero-banner-copy .mini{font-weight:800;letter-spacing:.12em;font-size:12px;opacity:.8}.hero-banner-copy h2{color:#fff;font-size:34px;margin:12px 0}.hero-banner-copy p{margin-bottom:0;color:#eaf3ff}.hero-side{padding:18px;background:#fff;border:1px solid rgba(20,120,242,.12);display:grid;gap:10px}.hero-side a{padding:18px;border-radius:15px;background:#f7faff;border:1px solid transparent}.hero-side a:hover{border-color:rgba(20,120,242,.18);background:#edf5ff}.hero-side strong{display:block;color:#172033;font-size:17px}.hero-side span{display:block;color:#6f7a89;font-size:13px;margin-top:6px}.channel-strip{overflow-x:auto;scrollbar-width:none;border-top:1px solid rgba(30,50,70,.08);border-bottom:1px solid rgba(30,50,70,.08)}.channel-strip::-webkit-scrollbar{display:none}.channel-strip .shell{display:flex;min-width:max-content;gap:24px;padding-top:14px;padding-bottom:14px}.channel-strip a{display:flex;align-items:center;gap:8px;font-weight:700;font-size:14px}.channel-strip i{width:7px;height:7px;border-radius:50%;background:#1478f2}.overview-grid{display:grid;grid-template-columns:1.2fr .9fr 1.05fr .85fr;gap:14px}.overview-card{padding:25px;min-height:190px}.overview-card:nth-child(2){margin-top:28px}.overview-card:nth-child(4){margin-top:16px}.discussion-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:18px}.feature-discussion{padding:34px;min-height:430px;background:#172f50;color:#eaf3ff}.feature-discussion h3{color:#fff;font-size:32px}.discussion-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}.discussion-item{padding:20px}.map-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:14px}.map-item{padding:24px;min-height:180px}.map-item:nth-child(1),.map-item:nth-child(4){grid-column:span 5}.map-item:nth-child(2),.map-item:nth-child(5){grid-column:span 4}.map-item:nth-child(3),.map-item:nth-child(6){grid-column:span 3}.life-grid{columns:3 280px;column-gap:16px}.life-card{break-inside:avoid;margin:0 0 16px;padding:24px}.life-card:nth-child(3n+1){padding-bottom:34px}.route-list{display:grid;gap:0}.route-item{display:grid;grid-template-columns:110px 1fr auto;gap:20px;padding:24px 0;border-bottom:1px solid rgba(30,50,70,.08);align-items:start}.route-no{font-size:12px;font-weight:900;color:#1478f2;letter-spacing:.12em}.interest-wall{display:flex;flex-wrap:wrap;gap:12px;align-items:stretch}.interest-pill{flex:1 1 220px;padding:20px;border-radius:18px;background:#fff;border:1px solid rgba(20,120,242,.12)}.interest-pill:nth-child(3n+1){flex-basis:310px}.qa-list{display:grid;gap:12px}.qa-row{padding:24px;border-radius:18px;background:#fff;border:1px solid rgba(30,50,70,.08);display:grid;grid-template-columns:34px 1fr;gap:14px}.qa-row .q{color:#1478f2;font-weight:900}.story-layout{display:grid;grid-template-columns:1.2fr .8fr;gap:18px}.story-main{padding:34px}.story-list{display:grid;gap:12px}.story-small{padding:22px}.masonry{columns:3 280px;column-gap:16px}.masonry article{break-inside:avoid;padding:22px;margin-bottom:16px}.guide-index{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.guide-item{padding:26px;display:grid;grid-template-columns:44px 1fr;gap:16px}.principles{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.principle{padding:24px}.notice-list{border-top:1px solid rgba(30,50,70,.08)}.notice-row{display:grid;grid-template-columns:180px 1fr auto;gap:22px;padding:22px 0;border-bottom:1px solid rgba(30,50,70,.08)}.app-showcase{display:grid;grid-template-columns:1.1fr .9fr;gap:28px;align-items:center}.app-visual{min-height:460px;border-radius:28px;background:#edf5ff;display:flex;align-items:center;justify-content:center;padding:30px;overflow:hidden}.app-visual img{max-height:420px;object-fit:contain}.phone-fallback{width:230px;height:420px;border:12px solid #172033;border-radius:36px;background:linear-gradient(#fff,#edf5ff);box-shadow:0 16px 42px rgba(20,120,242,.15);position:relative}.phone-fallback:before{content:"海角社区";position:absolute;left:26px;top:56px;color:#1478f2;font-weight:900;font-size:24px}.phone-fallback:after{content:"城市 · 兴趣 · 旅行 · 经验";position:absolute;left:26px;top:104px;right:26px;color:#6f7a89;font-size:14px}.service-four{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:24px}.service-four div{padding:18px;border-radius:14px;background:#f7faff}.safety-pair{display:grid;grid-template-columns:1.05fr .95fr;gap:20px}.safety-block{padding:34px}.safety-block:nth-child(2){margin-top:46px}.checklist{display:grid;grid-template-columns:repeat(2,1fr);gap:8px 16px;margin:22px 0 0;padding:0;list-style:none}.checklist li:before{content:"•";color:#1478f2;font-weight:900;margin-right:8px}.faq-stack details{border-bottom:1px solid rgba(30,50,70,.08);padding:0}.faq-stack summary{cursor:pointer;list-style:none;padding:20px 34px 20px 0;font-weight:800;color:#172033;position:relative}.faq-stack summary::-webkit-details-marker{display:none}.faq-stack summary:after{content:"＋";position:absolute;right:0;top:18px;color:#1478f2}.faq-stack details[open] summary:after{content:"－"}.faq-stack details p{padding:0 0 20px;max-width:880px;color:#5f6c7c}.brand-statement{padding:54px;border-radius:28px;background:linear-gradient(140deg,#1478f2,#084a9c);color:#eaf3ff}.brand-statement h2{color:#fff;max-width:780px}.brand-statement p{max-width:930px}.page-intro{padding:68px 0 38px}.page-intro .shell{display:grid;grid-template-columns:.9fr 1.1fr;gap:50px;align-items:end}.page-intro h1{margin:14px 0 0}.page-intro p{font-size:18px;margin-bottom:0}.topic-board{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.topic-card{padding:28px}.topic-card h2{font-size:24px}.topic-meta{display:flex;justify-content:space-between;gap:16px;padding-top:18px;border-top:1px solid rgba(30,50,70,.08);font-size:13px;color:#6f7a89}.content-band{display:grid;grid-template-columns:220px 1fr;gap:34px;padding:30px 0;border-top:1px solid rgba(30,50,70,.08)}.content-band h2{font-size:24px}.content-band p:last-child{margin-bottom:0}.step-list{counter-reset:step;display:grid;gap:0}.step{counter-increment:step;display:grid;grid-template-columns:72px 1fr;gap:24px;padding:26px 0;border-top:1px solid rgba(30,50,70,.08)}.step:before{content:counter(step,decimal-leading-zero);color:#1478f2;font-weight:900;font-size:18px}.tag-cloud{display:flex;flex-wrap:wrap;gap:10px}.tag-cloud span,.tag-cloud a{padding:10px 14px;border-radius:999px;background:#edf5ff;color:#075dc9;font-weight:800}.rules-layout{display:grid;grid-template-columns:280px 1fr;gap:28px}.side-index{position:sticky;top:96px;align-self:start;padding:20px}.side-index a{display:block;padding:10px 12px;border-radius:10px}.side-index a:hover{background:#edf5ff;color:#1478f2}.rule-section{padding:0 0 28px;margin-bottom:28px;border-bottom:1px solid rgba(30,50,70,.08)}.process{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.process div{padding:22px;border-radius:16px;background:#fff;border:1px solid rgba(20,120,242,.12)}.contact-paths{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.contact-path{padding:26px}.empty-form{padding:28px;border-radius:18px;background:#f7faff;border:1px dashed rgba(20,120,242,.25)}.site-footer{background:#0b1f38;color:#eaf3ff;padding:64px 0 92px}.footer-shell{max-width:1280px;margin:0 auto;padding:0 22px}.footer-brand{max-width:680px}.footer-brand-mark{display:inline-flex;align-items:center;color:#fff;font-size:24px}.footer-brand-mark img{max-width:140px;max-height:42px}.footer-en{font-size:11px;letter-spacing:.18em;color:#9fc6f8;margin:10px 0 16px}.footer-brand p,.footer-note{color:#bdd0e8}.footer-groups{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding:38px 0;border-top:1px solid rgba(255,255,255,.1);border-bottom:1px solid rgba(255,255,255,.1);margin-top:34px}.footer-groups h2{color:#fff;font-size:15px}.footer-groups a{display:block;color:#cfe0f4;padding:5px 0}.footer-groups a:hover{color:#fff}.footer-note{max-width:920px;margin:30px 0}.footer-bottom{display:flex;justify-content:space-between;gap:20px;color:#9fb4cd;font-size:13px}.overlay{position:fixed;inset:74px 0 0;background:rgba(11,31,56,.36);z-index:130;visibility:hidden;opacity:0;pointer-events:none;transition:.2s}.overlay.is-open{visibility:visible;opacity:1;pointer-events:auto}.mega-menu,.search-panel{position:fixed;top:74px;left:0;right:0;z-index:140;background:#fff;max-height:calc(100vh - 74px);overflow:auto;visibility:hidden;opacity:0;pointer-events:none;transform:translateY(-12px);transition:.22s}.mega-menu.is-open,.search-panel.is-open{visibility:visible;opacity:1;pointer-events:auto;transform:none}.mega-inner,.search-inner{max-width:1280px;margin:0 auto;padding:30px 22px 38px}.panel-heading{display:flex;justify-content:space-between;gap:20px;align-items:flex-start;margin-bottom:24px}.panel-heading h2{margin:6px 0 0}.close-button{width:46px;height:46px;border-radius:50%;border:1px solid rgba(20,120,242,.12);background:#f7faff;color:#172033;font-size:28px;line-height:1}.mega-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.mega-group{padding:18px;border-radius:18px;background:#f7faff}.mega-group h3{font-size:14px;color:#1478f2}.mega-group a{display:block;padding:11px 0;border-top:1px solid rgba(30,50,70,.07)}.mega-group b{display:block;color:#172033}.mega-group span{display:block;color:#6f7a89;font-size:12px;margin-top:3px;line-height:1.55}.search-box input{width:100%;height:58px;padding:0 18px;border:1px solid rgba(20,120,242,.22);border-radius:16px;outline:none;background:#f7faff;color:#172033}.search-box input:focus{border-color:#1478f2;box-shadow:0 0 0 4px rgba(20,120,242,.08)}.search-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:28px;margin-top:24px}.search-chips{display:flex;flex-wrap:wrap;gap:8px}.search-chips button{border:0;background:#edf5ff;color:#075dc9;padding:8px 11px;border-radius:999px;font-weight:700}.search-links{display:grid;grid-template-columns:1fr 1fr;gap:10px}.search-links a{padding:15px;border-radius:14px;border:1px solid rgba(30,50,70,.08)}.search-links b,.search-links span{display:block}.search-links b{color:#172033}.search-links span{font-size:12px;color:#6f7a89;margin-top:4px}.search-empty{color:#6f7a89}.panel-open{overflow:hidden}.mobile-only{display:none!important}.mobile-bottom-nav{display:none}.icon-button,.mobile-discover{min-width:44px;min-height:44px}.menu-lines{display:grid;gap:4px}.menu-lines i{display:block;width:19px;height:2px;background:#172033;border-radius:2px}.mobile-discover{align-items:center;justify-content:center;font-weight:800;color:#1478f2}.primary-button:hover{filter:brightness(1.03);transform:translateY(-1px)}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid rgba(20,120,242,.32);outline-offset:3px}.muted{color:#6f7a89}.center{text-align:center}.max-copy{max-width:820px}.divider{height:1px;background:rgba(30,50,70,.08)}@media (max-width:1080px){.nav-shell{grid-template-columns:220px 1fr 190px;gap:8px}.brand-tag{display:none}.desktop-nav a,.nav-action{padding:0 8px;font-size:13px}.hero-grid{grid-template-columns:1fr 1.2fr}.hero-side{grid-column:1/-1;grid-template-columns:repeat(4,1fr);min-height:auto}.overview-grid{grid-template-columns:1fr 1fr}.principles{grid-template-columns:1fr 1fr}}@media (max-width:760px){body{padding-bottom:72px}.desktop-only{display:none!important}.mobile-only{display:flex!important}.site-header{height:62px}.nav-shell{height:62px;grid-template-columns:48px 1fr 48px;padding:0 15px}.brand-mobile{justify-content:center}.brand-mobile img{max-width:118px;max-height:34px}.brand-word{font-size:21px}.icon-button{align-items:center;justify-content:center;border:0;background:transparent;border-radius:10px}.site-main{min-height:50vh}.shell,.footer-shell{padding-left:15px;padding-right:15px}.section{padding:54px 0}.section-tight{padding:38px 0}.hero-editor{padding-top:26px}.hero-grid{display:flex;flex-direction:column}.hero-intro{min-height:auto;padding:24px}.hero-intro h1{font-size:38px}.today-prompt{display:none}.hero-banner{order:2;min-height:320px;padding:24px}.hero-banner-copy h2{font-size:26px}.hero-side{order:3;grid-template-columns:1fr 1fr;min-height:auto}.hero-side a{padding:16px}.channel-strip .shell{padding-left:15px;padding-right:15px}.overview-grid,.discussion-grid,.story-layout,.app-showcase,.safety-pair,.page-intro .shell,.rules-layout,.search-layout{grid-template-columns:1fr}.overview-card:nth-child(2),.overview-card:nth-child(4),.safety-block:nth-child(2){margin-top:0}.discussion-list,.guide-index,.contact-paths{grid-template-columns:1fr}.map-grid{grid-template-columns:1fr}.map-item:nth-child(n){grid-column:auto}.life-grid,.masonry{columns:1}.route-item{grid-template-columns:64px 1fr}.route-item .text-link{grid-column:2}.principles,.service-four,.process{grid-template-columns:1fr 1fr}.notice-row{grid-template-columns:1fr}.notice-row .text-link{justify-self:start}.section-heading{display:block}.section-heading .text-link{margin-top:10px}.page-intro{padding:44px 0 26px}.page-intro .shell{gap:18px}.topic-board{grid-template-columns:1fr}.content-band{grid-template-columns:1fr;gap:5px}.side-index{position:static}.footer-groups{grid-template-columns:1fr 1fr}.footer-bottom{display:block}.footer-bottom span{display:block;margin-top:8px}.site-footer{padding-bottom:102px}.mobile-bottom-nav{position:fixed;left:0;right:0;bottom:0;z-index:120;height:calc(64px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:rgba(255,255,255,.97);border-top:1px solid rgba(30,50,70,.08);display:grid!important;grid-template-columns:repeat(5,1fr)}.mobile-bottom-nav a{min-height:48px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1px;font-size:11px;color:#6f7a89}.mobile-bottom-nav a span{font-size:18px;line-height:1}.mobile-bottom-nav a.is-active{color:#1478f2;font-weight:800}.overlay{inset:0;z-index:190}.mega-menu{top:0;left:auto;width:min(88vw,390px);height:100vh;max-height:100vh;right:0;z-index:200;transform:translateX(100%);box-shadow:-18px 0 45px rgba(11,31,56,.16)}.mega-menu.is-open{transform:none}.mega-inner{padding:22px 15px 38px}.mega-grid{grid-template-columns:1fr}.search-panel{top:0;height:100vh;max-height:100vh;z-index:210;transform:none}.search-panel.is-open{transform:none}.search-inner{padding:20px 15px 40px}.search-links{grid-template-columns:1fr}.panel-heading h2{font-size:25px}.checklist{grid-template-columns:1fr}.brand-statement{padding:32px 24px;border-radius:22px}.app-visual{min-height:390px}.step{grid-template-columns:52px 1fr}.topic-meta{display:block}.topic-meta span{display:block;margin-top:4px}}@media (max-width:430px){.hero-side{grid-template-columns:1fr}.principles,.service-four,.process,.footer-groups{grid-template-columns:1fr}.hero-banner{min-height:280px}.phone-fallback{transform:scale(.9)}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;scroll-behavior:auto!important}}