:root{--bg:#E7F4F8;--deep-bg:#D7ECF2;--panel:#F3FAFC;--sub:#EAF6F9;--title:#163038;--text:#1F3C44;--muted:#4A6E78;--assist:#6A8C96;--blue:#7EB8E0;--cyan:#6EC9D4;--bay:#1A3A44;--fog:#F3FAFC;--kelp:#5A8A6A;--border:rgba(26,58,68,.14);--focus:rgba(110,201,212,.50);--shadow:0 12px 28px rgba(22,48,56,.08)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:"PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;font-size:15px;line-height:1.7;overflow-x:hidden}body.ui-locked{overflow:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}button{cursor:pointer}img{display:block;max-width:100%;object-fit:contain;object-position:center}.shell{width:min(100% - 32px,1000px);margin:0 auto}
.site-head{position:relative;z-index:50}.tide-brow{position:fixed;inset:0 0 auto;height:20px;background:var(--bay);color:var(--fog);z-index:55}.tide-brow-inner{height:20px;display:flex;align-items:center;justify-content:space-between;font-size:12px;line-height:1}.text-action{border:0;background:transparent;color:var(--fog);height:20px;padding:0 2px}.text-action:focus-visible,.menu-trigger:focus-visible,.close-control:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
.bay-brand{position:fixed;top:20px;left:0;right:0;height:54px;background:var(--blue);border-bottom:1px solid rgba(110,201,212,.75);z-index:54}.bay-brand-inner{height:54px;display:flex;align-items:center;justify-content:space-between}.brand-home{min-height:44px;display:flex;align-items:center}.brand-home img,.footer-logo-wrap img,.bay-menu-brand img{height:24px;width:auto}.brand-fallback{font-size:16px;font-weight:700;color:var(--title)}.brand-actions{display:flex;align-items:center;gap:8px}.brand-app,.menu-trigger{min-height:44px;display:inline-flex;align-items:center;justify-content:center;padding:0 14px;border-radius:8px;border:1px solid rgba(26,58,68,.22);color:var(--title);background:rgba(243,250,252,.72);font-size:14px}.menu-trigger{min-width:58px}
.shore-points{position:fixed;top:74px;left:0;right:0;height:44px;background:var(--fog);border-bottom:1px solid var(--border);z-index:53}.shore-point-inner{height:44px;display:flex;align-items:stretch;justify-content:center}.shore-point{min-width:120px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;font-size:13px;color:var(--muted)}.point-dot{width:6px;height:6px;border-radius:50%;background:var(--cyan)}.shore-point.is-current{color:var(--bay);font-weight:700}.shore-point.is-current .point-dot{background:var(--bay)}
.site-main{padding:144px 0 72px;min-height:70vh}h1,h2,h3,p{margin-top:0}h1{font-size:24px;line-height:1.3;color:var(--title);margin-bottom:16px}h2{font-size:20px;line-height:1.4;color:var(--title);margin-bottom:12px}h3{font-size:16px;line-height:1.5;color:var(--title);margin-bottom:8px}p{margin-bottom:14px}.lead{font-size:16px;color:var(--muted)}.eyebrow{font-size:12px;letter-spacing:.12em;color:var(--kelp);font-weight:700;text-transform:uppercase}.muted{color:var(--muted)}
.btn-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}.btn{height:42px;padding:0 18px;border-radius:9px;display:inline-flex;align-items:center;justify-content:center;font-size:14px;font-weight:700}.btn-primary{background:linear-gradient(135deg,#7EB8E0 0%,#6EC9D4 100%);color:var(--title);border:1px solid rgba(26,58,68,.08)}.btn-secondary{background:var(--fog);color:var(--bay);border:1px solid var(--bay)}.btn:hover{transform:translateY(-1px);box-shadow:var(--shadow)}
.media-slot{background:var(--deep-bg);border:1px solid var(--border);border-radius:10px;display:flex;align-items:center;justify-content:center;overflow:hidden}.media-slot img{width:100%;height:100%}.media-short{height:188px}.media-wide{height:230px}.media-banner{height:200px}.media-portrait{height:min(320px,65vw)}.media-square{height:220px}
.section{margin:0 auto 34px}.panel{background:var(--panel);border:1px solid var(--border);border-radius:10px;box-shadow:var(--shadow);padding:22px}.sub-panel{background:var(--sub);border:1px solid var(--border);border-radius:9px;padding:18px}.rule-line{border-top:1px solid var(--border);padding-top:18px;margin-top:18px}
.home-intro{border-left:3px solid var(--cyan);padding:8px 0 8px 18px;margin-bottom:30px}.home-intro p{max-width:760px}.home-cover{margin-bottom:34px}.stagger-stack{display:grid;gap:18px}.stagger-item{background:var(--panel);border:1px solid var(--border);border-radius:10px;overflow:hidden}.stagger-copy{padding:20px}.vertical-notes{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.note-tall{min-height:300px;background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:18px;display:flex;flex-direction:column}.note-tall .media-slot{height:130px;margin-bottom:14px}.shelf-intro{display:grid;grid-template-columns:1fr 1fr;gap:16px;max-width:760px;margin:0 auto}.shelf-head{max-width:760px;margin:0 auto 16px}.periods{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.periods article{background:var(--sub);border:1px solid var(--border);border-radius:9px;padding:18px}.timeline-status{display:grid;gap:10px}.timeline-status div{display:grid;grid-template-columns:140px 1fr auto;align-items:center;gap:14px;background:var(--panel);border:1px solid var(--border);border-radius:8px;padding:14px}.status-chip{font-size:12px;padding:4px 9px;border-radius:99px;background:var(--deep-bg);color:var(--bay);white-space:nowrap}.app-band{display:grid;grid-template-columns:minmax(220px,.8fr) 1.2fr;gap:26px;align-items:center;background:var(--bay);color:var(--fog);border-radius:12px;padding:24px}.app-band h2,.app-band h3{color:var(--fog)}.app-band .media-slot{background:var(--sub)}.app-icon-row{display:flex;align-items:center;gap:12px;margin-bottom:14px}.app-icon-slot{width:48px;height:48px;border-radius:10px;background:var(--fog);display:flex;align-items:center;justify-content:center;overflow:hidden}.app-icon-slot img{width:48px;height:48px}.tip-list{display:grid;grid-template-columns:1fr 1fr;gap:14px}.faq-mini{display:grid;grid-template-columns:1fr 1fr;gap:12px}.faq-mini details{background:var(--panel);border:1px solid var(--border);border-radius:9px;padding:14px}.faq-mini summary{font-weight:700;color:var(--title);cursor:pointer}
.page-hero{margin-bottom:26px}.page-hero p{max-width:780px}.left-rail{border-left:3px solid var(--cyan);padding-left:20px}.cover-header{display:grid;gap:18px}.interlace{display:grid;gap:18px}.interlace-row{display:grid;grid-template-columns:1fr 1fr;gap:18px;align-items:center}.interlace-row:nth-child(even) .interlace-text{order:2}.interlace-row:nth-child(even) .media-slot{order:1}.note-columns{display:grid;grid-template-columns:1fr 1fr 1fr;gap:14px}.note-columns article{min-height:330px;background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:18px}.single-log{display:grid;gap:14px;max-width:760px;margin:0 auto}.single-log article{padding:18px 0;border-bottom:1px solid var(--border)}.single-log article:last-child{border-bottom:0}.phase-list{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.phase-list article{background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:20px}.status-list{display:grid;gap:10px}.status-list article{display:grid;grid-template-columns:150px 1fr auto;gap:16px;align-items:center;padding:16px;background:var(--panel);border-left:4px solid var(--cyan);border-radius:8px;box-shadow:var(--shadow)}.memo-board{display:grid;grid-template-columns:1fr 1fr;gap:14px}.memo-board article{background:var(--sub);border:1px solid var(--border);border-radius:9px;padding:18px}.method-steps{counter-reset:method;display:grid;gap:16px}.method-steps article{counter-increment:method;display:grid;grid-template-columns:56px 1fr;gap:16px;align-items:start}.method-steps article:before{content:counter(method,decimal-leading-zero);width:48px;height:48px;border-radius:50%;background:var(--cyan);display:flex;align-items:center;justify-content:center;color:var(--title);font-weight:700}.topic-list{display:grid;gap:12px}.topic-list article{background:var(--panel);border:1px solid var(--border);border-radius:9px;padding:18px;display:grid;grid-template-columns:180px 1fr;gap:18px}.center-cards{display:grid;grid-template-columns:1fr 1fr;gap:16px;max-width:820px;margin:0 auto}.center-cards article{text-align:center;background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:22px}.product-wide{background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:24px;display:grid;grid-template-columns:280px 1fr;gap:26px;align-items:center}.product-wide .media-slot{height:320px}.legal-sections{display:grid;gap:14px}.legal-sections section{background:var(--panel);border:1px solid var(--border);border-radius:9px;padding:20px}.help-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.help-grid article{background:var(--panel);border:1px solid var(--border);border-radius:9px;padding:18px}.faq-list{display:grid;gap:12px}.faq-list details{background:var(--panel);border:1px solid var(--border);border-radius:9px;padding:16px}.faq-list summary{font-weight:700;color:var(--title);cursor:pointer}.contact-routes{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.contact-routes article{background:var(--panel);border-top:3px solid var(--cyan);border-radius:10px;padding:20px}.about-banner{margin-bottom:24px}.brand-statement{display:grid;grid-template-columns:1.2fr .8fr;gap:20px}.brand-statement aside{background:var(--deep-bg);border-radius:10px;padding:20px}
.site-footer{background:#143038;color:#E7F4F8;border-top:1px solid var(--cyan);padding:34px 0 80px;font-size:13px}.footer-brandline{padding-bottom:20px;border-bottom:1px solid rgba(231,244,248,.16);margin-bottom:20px}.footer-logo-wrap{display:flex;align-items:center;gap:10px;min-height:44px}.footer-logo-wrap strong{font-size:12px;letter-spacing:.08em;color:#B9DAE3}.footer-links{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.footer-links h2{color:#E7F4F8;font-size:14px;margin:0 0 8px}.footer-links a{display:block;color:#D2E8EE;min-height:30px;padding:4px 0}.footer-links a:hover{text-decoration:underline}.footer-note{color:#C1DCE4;margin:24px 0 10px}.copyright{color:#9FC3CC;margin:0}
.ui-overlay{position:fixed;inset:0;background:rgba(20,48,56,.46);z-index:80;opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.ui-overlay.is-open{opacity:1;visibility:visible;pointer-events:auto}.bay-menu{position:fixed;left:0;right:0;top:0;height:58vh;background:var(--panel);z-index:90;transform:translateY(-105%);visibility:hidden;pointer-events:none;transition:transform .24s ease;box-shadow:0 18px 40px rgba(22,48,56,.18);overflow:auto}.bay-menu.is-open{transform:translateY(0);visibility:visible;pointer-events:auto}.bay-menu-head{height:66px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border)}.bay-menu-brand{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--title)}.close-control{min-height:44px;border:1px solid var(--bay);border-radius:8px;background:var(--fog);color:var(--bay);padding:0 14px}.bay-menu-grid{display:grid;grid-template-columns:1fr 1fr 1fr 1.3fr;gap:18px;padding-top:18px;padding-bottom:28px}.bay-menu-grid h2{font-size:14px}.bay-menu-grid a{display:block;padding:8px 0;border-bottom:1px solid var(--border)}.bay-menu-grid strong{display:block;font-size:14px}.bay-menu-grid span{display:block;color:var(--muted);font-size:12px;line-height:1.5;margin-top:2px}
.site-search{position:fixed;top:74px;left:0;right:0;z-index:88;visibility:hidden;pointer-events:none;opacity:0;transition:.2s}.site-search.is-open{visibility:visible;pointer-events:auto;opacity:1}.search-card{background:var(--fog);border:1px solid var(--border);border-radius:0 0 12px 12px;padding:20px;box-shadow:var(--shadow)}.search-top{display:flex;justify-content:space-between;align-items:center;gap:16px}.search-top h2{margin:0}.search-card label{display:block;color:var(--muted);font-size:13px;margin:14px 0 6px}.search-card input{width:100%;height:44px;border:1px solid var(--border);border-radius:8px;background:#fff;color:var(--text);padding:0 12px}.search-links{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}.search-links a{min-height:40px;padding:8px 14px;border:1px solid var(--border);border-radius:8px;background:var(--sub)}
.mobile-dock{display:none}
@media (max-width:760px){.shell{width:min(100% - 32px,1000px)}.shore-points{display:none}.site-main{padding-top:94px;padding-bottom:82px}.bay-brand-inner{gap:8px}.brand-actions{gap:6px}.brand-app,.menu-trigger{padding:0 10px;min-width:auto}.vertical-notes,.periods,.phase-list,.note-columns{grid-template-columns:1fr}.shelf-intro,.center-cards,.tip-list,.faq-mini,.help-grid,.memo-board,.contact-routes{grid-template-columns:1fr}.app-band,.product-wide,.brand-statement,.interlace-row{grid-template-columns:1fr}.interlace-row:nth-child(even) .interlace-text,.interlace-row:nth-child(even) .media-slot{order:initial}.timeline-status div,.status-list article{grid-template-columns:1fr;gap:8px}.topic-list article{grid-template-columns:1fr}.footer-links{grid-template-columns:1fr 1fr}.bay-menu{height:58vh}.bay-menu-grid{grid-template-columns:1fr 1fr}.site-search{top:0;bottom:0;background:var(--bay)}.site-search.is-open{display:flex;align-items:stretch}.search-card{width:100%;height:100%;border-radius:0;background:var(--bay);color:var(--fog);padding-top:calc(24px + env(safe-area-inset-top))}.search-top h2,.search-card label{color:var(--fog)}.search-links a{background:rgba(243,250,252,.1);border-color:rgba(243,250,252,.28);color:var(--fog)}.mobile-dock{position:fixed;left:0;right:0;bottom:0;z-index:60;height:calc(48px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);display:grid;grid-template-columns:repeat(4,1fr);background:var(--fog);border-top:1px solid var(--border)}.mobile-dock a{display:flex;align-items:center;justify-content:center;min-height:48px;font-size:13px;color:var(--muted)}.mobile-dock a.is-current{background:var(--cyan);color:var(--bay);font-weight:700}.site-footer{padding-bottom:calc(74px + env(safe-area-inset-bottom))}.media-short{height:188px}.media-wide{height:210px}.product-wide .media-slot{height:300px}}
@media (max-width:520px){.bay-menu-grid{grid-template-columns:1fr}.footer-links{grid-template-columns:1fr 1fr}.footer-logo-wrap{flex-wrap:wrap}.home-intro{padding-left:14px}.panel,.sub-panel{padding:16px}.app-band{padding:18px}.media-square{height:190px}}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}

.mt-14{margin-top:14px}.mt-16{margin-top:16px}.mt-20{margin-top:20px}.mt-24{margin-top:24px}.centered-hero{text-align:center;max-width:780px;margin-left:auto;margin-right:auto}.content-820{max-width:820px;margin-left:auto;margin-right:auto}.shelf-visual{margin-bottom:18px}