:root{--bg:#F3F8FD;--deep-bg:#DCEAF6;--card:#FFFFFF;--navy:#0E3A5C;--text:#24384C;--muted:#5A7388;--assist:#7A93A8;--sky:#5BA3D0;--tide:#3D7EA6;--mist:#C5E4F5;--sand:#E8C9A0;--border:rgba(14,58,92,.12);--shadow:0 14px 34px rgba(14,58,92,.10);--head-h:122px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;line-height:1.75;overflow-x:hidden}a{color:var(--tide);text-decoration:none}a:hover{text-decoration:underline}button,input{font:inherit}.skip-link{position:fixed;left:16px;top:-60px;z-index:1200;background:#fff;color:var(--navy);padding:10px 14px;border-radius:8px}.skip-link:focus{top:12px}.shell{width:min(1120px,calc(100% - 32px));margin:0 auto}.site-header{position:fixed;inset:0 0 auto 0;z-index:900;box-shadow:0 4px 16px rgba(14,58,92,.08)}.tide-line{height:8px;background:var(--tide);color:#fff;font-size:0}.tide-line-inner{height:8px;display:flex;align-items:center;justify-content:space-between}.tide-line-inner>span,.tide-line .text-button{font-size:0;line-height:0}.tide-line .text-button{width:44px;height:8px;position:relative;border:0;background:transparent;color:transparent;cursor:pointer}.tide-line .text-button:after{content:"搜索";position:absolute;right:0;top:8px;color:#fff;background:var(--tide);font-size:12px;line-height:26px;height:26px;padding:0 10px;border-radius:0 0 6px 6px}.tide-stage{height:50px;background:#fff;border-bottom:1px solid var(--mist)}.tide-stage-inner{height:50px;display:flex;align-items:center;justify-content:space-between;gap:16px}.brand{display:flex;align-items:center;min-width:0}.brand-logo,.footer-logo,.bay-brand img{height:26px;max-width:190px;width:auto;object-fit:contain}.brand-fallback{font-weight:800;color:var(--navy);font-size:20px}.stage-actions{display:flex;align-items:center;gap:8px}.primary-btn,.secondary-btn,.link-btn{min-height:44px;display:inline-flex;align-items:center;justify-content:center;padding:0 16px;border-radius:10px;font-weight:700;cursor:pointer}.primary-btn{background:var(--tide);color:#fff;border:1px solid var(--tide)}.primary-btn:hover{color:#fff;background:#326c91;text-decoration:none}.secondary-btn,.link-btn.secondary{background:#fff;color:var(--navy);border:1px solid var(--sky)}.secondary-btn:hover,.link-btn.secondary:hover{text-decoration:none;background:#eef7fd}.tide-bridge{height:64px;background:var(--mist)}.bridge-grid{display:grid;grid-template-columns:repeat(5,1fr);height:64px;width:100%}.bridge-grid a{display:flex;align-items:center;justify-content:center;color:var(--navy);font-weight:700;border-right:1px solid rgba(255,255,255,.8)}.bridge-grid a:last-child{border-right:0}.bridge-grid a:hover,.bridge-grid a.active{background:#fff;text-decoration:none}.site-main{padding-top:calc(var(--head-h) + 28px);min-height:70vh}.hero,.section-card,.article-shell,.feature-row,.mini-card,.faq-item,.info-strip{background:#fff;border:1px solid var(--border);border-radius:12px;box-shadow:var(--shadow)}.hero{padding:22px;margin-bottom:24px}.cover-slot,.image-slot{display:flex;align-items:center;justify-content:center;background:linear-gradient(180deg,#edf7fd,#dfeef8);border:1px solid var(--border);border-radius:12px;overflow:hidden}.cover-slot{max-height:200px;min-height:145px}.cover-slot img{width:100%;max-height:200px;object-fit:contain;object-position:center}.cover-fallback{font-weight:800;color:var(--navy);font-size:clamp(24px,4vw,36px);padding:54px 20px;text-align:center}.eyebrow{color:var(--tide);font-size:14px;font-weight:800;letter-spacing:.08em;margin:18px 0 4px}.hero h1,.article-shell h1{color:var(--navy);font-size:clamp(28px,3vw,32px);line-height:1.3;margin:4px 0 14px}.hero-intro{font-size:16px;max-width:860px}.actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.link-btn{background:var(--tide);color:#fff}.link-btn:hover{color:#fff;text-decoration:none}.section-title{color:var(--navy);font-size:26px;margin:0 0 8px}.section-lead{margin:0 0 18px;color:var(--muted)}.home-section{margin:24px auto}.three-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.mini-card{padding:16px}.mini-card h2,.mini-card h3{color:var(--navy);margin:10px 0 6px}.mini-card p{margin:0 0 10px}.image-slot{height:168px}.image-slot img{width:100%;height:100%;object-fit:contain;object-position:center}.image-slot.tall{height:300px}.image-slot.tall img{max-height:420px;height:100%;width:100%;object-fit:contain}.feature-row{padding:20px;display:grid;grid-template-columns:1.25fr .85fr;gap:24px;align-items:center}.feature-row.reverse{grid-template-columns:.85fr 1.25fr}.feature-copy h2{color:var(--navy);font-size:25px;margin:0 0 8px}.feature-copy p{margin:0 0 12px}.feature-row .image-slot{height:176px}.app-feature{grid-template-columns:1fr .7fr}.mark-wrap{display:flex;gap:16px;align-items:center;margin-top:14px}.mark-wrap img{width:64px;height:64px;object-fit:contain}.info-strip{padding:20px;border-left:5px solid var(--sand)}.info-strip h2{color:var(--navy);margin-top:0}.article-shell{padding:28px;margin-bottom:28px}.article-shell .page-intro{font-size:17px;color:var(--muted);margin-bottom:24px}.article-shell section{margin:28px 0}.article-shell h2{color:var(--navy);font-size:23px;margin:0 0 10px}.article-shell h3{color:var(--navy);font-size:18px;margin:16px 0 6px}.article-shell ul,.article-shell ol{padding-left:22px}.article-visual{margin:20px 0}.article-visual .image-slot{height:180px}.note-box{background:#eef7fd;border-left:4px solid var(--sky);padding:14px 16px;border-radius:10px;margin:18px 0}.sand-box{background:#fff9f0;border-left:4px solid var(--sand);padding:14px 16px;border-radius:10px}.two-col{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.callouts{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.callout{background:var(--deep-bg);border-radius:12px;padding:16px;color:var(--navy)}.callout strong{display:block;margin-bottom:4px}.faq-list{display:grid;gap:14px}.faq-item{padding:18px}.faq-item h2{font-size:19px;margin:0 0 8px}.site-footer{background:var(--navy);color:var(--mist);margin-top:38px;padding:34px 0 calc(34px + env(safe-area-inset-bottom))}.footer-brand{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:22px}.footer-brand strong{color:#fff;font-size:20px}.footer-brand span{font-size:13px;letter-spacing:.1em}.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}.footer-grid h2{font-size:16px;color:#fff;margin:0 0 8px}.footer-grid a{display:block;color:var(--mist);padding:3px 0}.footer-note{border-top:1px solid rgba(197,228,245,.2);padding-top:20px;margin-top:22px}.copyright{color:#fff;font-size:14px}.overlay{position:fixed;inset:0;background:rgba(5,25,40,.42);z-index:940;opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.overlay.is-open{opacity:1;visibility:visible;pointer-events:auto}.tide-bay{position:fixed;left:0;top:58px;width:300px;height:min(480px,calc(100vh - 70px));background:#fff;z-index:960;border-radius:0 0 12px 0;box-shadow:var(--shadow);overflow:auto;visibility:hidden;pointer-events:none;transform:translateY(-8px);opacity:0;transition:.2s}.tide-bay.is-open{visibility:visible;pointer-events:auto;transform:none;opacity:1}.bay-head{position:sticky;top:0;background:#fff;display:flex;align-items:center;justify-content:space-between;padding:12px 14px;border-bottom:1px solid var(--border);z-index:2}.bay-brand{display:flex;align-items:center;gap:8px;color:var(--navy)}.bay-brand img{max-width:132px;height:24px}.icon-close{min-width:44px;min-height:44px;border:1px solid var(--sky);background:#fff;color:var(--navy);border-radius:10px;cursor:pointer}.bay-groups{padding:10px 14px 18px}.bay-groups section{margin:0 0 14px}.bay-groups h2{font-size:14px;color:var(--tide);margin:8px 0}.bay-groups a{display:block;padding:9px 8px;border-radius:8px}.bay-groups a:hover{background:#eef7fd;text-decoration:none}.bay-groups span{display:block;color:var(--navy);font-weight:700}.bay-groups small{display:block;color:var(--muted);font-size:12px}.search-panel{position:fixed;left:max(16px,calc((100vw - 1120px)/2));top:62px;width:min(440px,calc(100vw - 32px));background:#fff;z-index:970;padding:18px;border-radius:0 0 12px 12px;box-shadow:var(--shadow);visibility:hidden;pointer-events:none;opacity:0;transform:translateY(-8px);transition:.2s}.search-panel.is-open{visibility:visible;pointer-events:auto;opacity:1;transform:none}.search-head{display:flex;justify-content:space-between;align-items:center;color:var(--navy);margin-bottom:10px}.search-panel label{display:block;color:var(--muted);font-size:14px;margin-bottom:8px}.search-panel input{width:100%;min-height:44px;border:1px solid var(--sky);border-radius:10px;padding:8px 12px;color:var(--text);outline:none}.search-panel input:focus{box-shadow:0 0 0 3px rgba(91,163,208,.2)}.search-links{display:grid;grid-template-columns:repeat(2,1fr);gap:8px;margin-top:12px}.search-links a{display:flex;min-height:44px;align-items:center;justify-content:center;background:#eef7fd;color:var(--navy);border-radius:10px}.lock-scroll{overflow:hidden}.mobile-bottom{display:none}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid var(--sand);outline-offset:2px}
@media(max-width:820px){:root{--head-h:58px}.tide-bridge{display:none}.site-main{padding-top:calc(var(--head-h) + 22px)}.three-grid,.two-col,.callouts{grid-template-columns:1fr}.feature-row,.feature-row.reverse,.app-feature{grid-template-columns:1fr}.feature-row.reverse .feature-copy{order:1}.feature-row.reverse .image-slot{order:2}.footer-grid{grid-template-columns:repeat(2,1fr)}.tide-bay{top:58px;width:min(94vw,420px);height:62vh}.search-panel{top:58px}.mobile-bottom{position:fixed;display:grid;grid-template-columns:repeat(5,1fr);left:0;right:0;bottom:0;height:calc(50px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:#fff;border-top:1px solid var(--border);z-index:920}.mobile-bottom a{display:flex;align-items:center;justify-content:center;color:var(--navy);font-size:13px}.mobile-bottom a.active{background:var(--tide);color:#fff;text-decoration:none}.site-footer{padding-bottom:calc(78px + env(safe-area-inset-bottom))}.hero,.article-shell{padding:20px 16px}.image-slot.tall{height:260px}.cover-slot{min-height:130px}.stage-actions{gap:6px}.primary-btn,.secondary-btn{padding:0 12px}.brand-logo{max-width:145px}.footer-brand{align-items:flex-start}.footer-grid{gap:16px}}
@media(max-width:480px){.shell{width:calc(100% - 32px)}.footer-grid{grid-template-columns:1fr 1fr}.search-links{grid-template-columns:1fr}.tide-bay{width:100%;border-radius:0;height:62vh}.hero h1,.article-shell h1{font-size:28px}.section-title{font-size:24px}.feature-row{padding:16px}.image-slot,.feature-row .image-slot{height:158px}.stage-actions .primary-btn{font-size:14px}.footer-brand span{width:100%}}