:root{--bg:#F4FAFC;--deep:#FFFFFF;--card:#FFFFFF;--soft:#E7F3F6;--title:#0E3A46;--text:#24505A;--muted:#4A7380;--aux:#7A9AA4;--sea:#1A7F8F;--bright:#2BB3C4;--dark:#0F5B68;--pale:#D7EEF2;--border:rgba(26,127,143,.16);--shadow:0 14px 34px rgba(14,58,70,.08);--max:1180px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:Arial,"Microsoft YaHei",sans-serif;line-height:1.75;overflow-x:hidden}body.locked{overflow:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}.wrap{width:min(var(--max),calc(100% - 32px));margin:auto}.site-head{position:fixed;inset:0 0 auto;z-index:40}.tide-line{height:20px;background:var(--dark);color:#fff;font-size:12px}.tide-inner,.lighthouse-inner{height:100%;display:flex;align-items:center;justify-content:space-between}.plain-btn{border:0;background:transparent;color:#fff;min-width:44px;height:20px;cursor:pointer}.lighthouse{height:62px;background:#fff;border-bottom:1px solid var(--border)}.lighthouse-inner{position:relative}.brand{display:flex;align-items:center;min-width:170px;font-size:20px;font-weight:800;color:var(--title)}.brand img,.catalog-head img,.footer-brand img{height:34px;max-width:190px;object-fit:contain}.catalog-btn{position:absolute;left:50%;transform:translateX(-50%);height:44px;padding:0 24px;border:1px solid var(--border);border-radius:12px;background:var(--soft);color:var(--title);font-weight:700;cursor:pointer}.app-link,.btn-primary,.btn-secondary{min-height:44px;display:inline-flex;align-items:center;justify-content:center;border-radius:12px;padding:0 18px;font-weight:700;white-space:nowrap}.app-link,.btn-primary{background:linear-gradient(135deg,#2BB3C4 0%,#1A7F8F 55%,#0F5B68 100%);color:#fff}.btn-secondary{background:#fff;border:1px solid var(--sea);color:var(--dark)}.shore-tabs{height:42px;background:var(--pale);border-bottom:1px solid var(--border)}.shore-tabs-inner{display:flex;gap:8px;align-items:center;height:100%;overflow:auto;justify-content:flex-start}.shore-tabs a{padding:6px 12px;border-radius:8px;color:var(--title);white-space:nowrap;font-size:14px}.shore-tabs a.is-active{background:var(--sea);color:#fff}.page-main{padding-top:124px}.section{padding:54px 0}.section.alt{background:var(--soft)}.section.deep{background:var(--dark);color:#fff}.section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:24px}.section-head h2{margin:0;color:var(--title);font-size:26px}.section.deep .section-head h2{color:#fff}.section-head p{margin:0;color:var(--muted);max-width:620px}.hero{padding:34px 0 46px}.hero-image{max-height:300px;aspect-ratio:16/9}.image-slot{background:var(--soft);border:1px solid var(--border);border-radius:16px;overflow:hidden;display:flex;align-items:center;justify-content:center}.image-slot img{width:100%;height:100%;object-fit:contain;object-position:center}.image-fallback{width:100%;height:100%;min-height:180px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#D7EEF2,#fff);color:var(--dark);font-weight:800;letter-spacing:.18em}.hero-copy{padding:22px 4px 0}.eyebrow{font-weight:800;color:var(--sea);letter-spacing:.08em}.hero h1,.page-hero h1{font-size:clamp(28px,4vw,32px);line-height:1.25;color:var(--title);margin:8px 0 14px}.hero-copy p{max-width:820px;margin:0 0 18px}.actions{display:flex;gap:12px;flex-wrap:wrap}.step-level{margin-bottom:14px}.step-level:last-child{margin-bottom:0}.step-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.step-card-lite{padding:16px 18px;border-radius:16px;background:var(--bright);color:#fff;min-height:116px}.step-card-lite:nth-child(even){background:var(--dark)}.step-card-lite h3{margin:0 0 7px;font-size:16px}.step-card-lite p{margin:0 0 8px;font-size:14px}.step-card-lite a{font-weight:700}.step-level.lower .step-card-lite:nth-child(odd){background:var(--dark)}.step-level.lower .step-card-lite:nth-child(even){background:var(--bright)}
.tag-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:12px}.tag-card{padding:18px;border-radius:14px;background:var(--bright);color:#fff;min-height:132px}.tag-card:nth-child(even){background:var(--dark)}.tag-card h3{margin:0 0 8px}.tag-card p{margin:0 0 10px;font-size:14px}.tag-card a{font-weight:700}.feature-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:24px;align-items:stretch}.feature-copy,.card,.long-board,.term-card,.step-card,.list-row,.faq-box{background:#fff;border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow)}.feature-copy{padding:24px}.feature-copy h2{color:var(--title);margin-top:0}.number-list{display:grid;gap:10px}.number-list a{display:grid;grid-template-columns:46px 1fr;gap:12px;padding:12px 0;border-top:1px solid var(--border)}.number-list strong{color:var(--sea);font-size:22px}.board-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.card{padding:16px}.card .image-slot{height:210px;margin-bottom:14px}.card h3{color:var(--title);margin:0 0 8px}.card p{margin:0}.journal-list,.album-list,.path-list,.terms,.steps{display:grid;gap:14px}.list-row,.long-board,.term-card,.step-card{padding:20px}.list-row{display:grid;grid-template-columns:54px 1fr;gap:16px}.list-row b{color:var(--sea);font-size:24px}.frames-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.frames-grid .image-slot{height:220px;margin-bottom:12px}.three-paths{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.three-paths article{padding:22px;border-radius:16px;background:#fff;border:1px solid var(--border)}.page-hero{padding:38px 0 22px}.page-hero p{max-width:860px}.content-shell{padding:10px 0 58px}.content-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.content-grid.single{grid-template-columns:1fr}.content-grid.three{grid-template-columns:repeat(3,1fr)}.content-grid article{background:#fff;border:1px solid var(--border);border-radius:16px;padding:22px}.content-grid article h2{margin-top:0;color:var(--title);font-size:22px}.wide-image{height:240px;margin-bottom:22px}.app-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:26px;align-items:center}.app-visual{height:420px}.app-icon{width:68px;height:68px;border-radius:16px;overflow:hidden;border:1px solid var(--border);background:var(--soft);display:flex;align-items:center;justify-content:center}.app-icon img{width:100%;height:100%;object-fit:contain}.overlay{position:fixed;inset:0;background:rgba(5,28,33,.46);z-index:60;visibility:hidden;opacity:0;pointer-events:none;transition:.2s}.overlay.open{visibility:visible;opacity:1;pointer-events:auto}.tide-catalog{position:fixed;top:0;right:0;width:400px;max-width:86vw;height:100vh;background:#fff;z-index:70;transform:translateX(100%);visibility:hidden;pointer-events:none;transition:.25s;box-shadow:-20px 0 50px rgba(14,58,70,.18)}.tide-catalog.open{transform:none;visibility:visible;pointer-events:auto}.catalog-head{height:78px;display:flex;align-items:center;gap:12px;padding:16px;border-bottom:1px solid var(--border)}.catalog-head strong{flex:1;color:var(--title)}.catalog-head button,.search-head button{min-width:44px;min-height:44px;border:1px solid var(--border);background:var(--soft);color:var(--title);border-radius:10px}.catalog-scroll{height:calc(100vh - 78px);overflow-y:auto;padding:18px}.catalog-scroll section{margin-bottom:14px;padding:12px 14px;background:linear-gradient(180deg,#F4FAFC,#E7F3F6);border:1px solid var(--border);border-radius:18px}.catalog-scroll h2{font-size:14px;color:var(--aux);margin:0 0 8px}.catalog-scroll a{display:block;padding:10px 0;border-bottom:1px solid var(--border)}.catalog-scroll a strong{display:block;color:var(--title)}.catalog-scroll a span{display:block;color:var(--muted);font-size:13px}.search-layer{position:fixed;top:82px;left:0;right:0;z-index:75;visibility:hidden;opacity:0;pointer-events:none;transition:.2s}.search-layer.open{visibility:visible;opacity:1;pointer-events:auto}.search-card{width:min(760px,calc(100% - 32px));margin:auto;background:#fff;border:1px solid var(--border);box-shadow:var(--shadow);padding:20px}.search-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}.search-head strong{color:var(--title);font-size:20px}.search-card label{display:block;color:var(--muted);margin-bottom:8px}.search-card input{width:100%;height:48px;border:1px solid var(--border);padding:0 14px;color:var(--title);background:var(--bg)}.search-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}.search-links a{border:1px solid var(--border);padding:8px 12px;border-radius:10px;color:var(--dark)}.site-footer{background:#0E3A46;color:#D4E8EC;padding:48px 0 24px}.footer-brand{display:flex;gap:16px;align-items:center;margin-bottom:28px}.footer-brand img{filter:none}.footer-brand strong,.footer-brand span{display:block;color:#fff}.footer-brand p{margin:6px 0 0;max-width:640px}.footer-groups{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;border-top:1px solid rgba(255,255,255,.14);padding-top:24px}.footer-groups h2{font-size:15px;color:#fff}.footer-groups a{display:block;padding:4px 0;color:#D4E8EC}.footer-note{margin-top:28px;padding-top:18px;border-top:1px solid rgba(255,255,255,.14)}.copyright{color:#9FC3CA}.mobile-bottom{display:none}.faq-list{display:grid;gap:12px}.faq-list details{background:#fff;border:1px solid var(--border);border-radius:14px;padding:16px 18px}.faq-list summary{cursor:pointer;font-weight:800;color:var(--title)}.faq-list p{margin:12px 0 0}.quote{border-left:4px solid var(--sea);padding-left:16px}.note-badge{display:inline-block;padding:3px 8px;border-radius:7px;background:var(--pale);color:var(--dark);font-size:13px}.status-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.status-grid article{padding:20px;background:#fff;border:1px solid var(--border);border-radius:16px}.status-grid strong{color:var(--sea)}
@media(max-width:900px){.step-grid{grid-template-columns:repeat(2,1fr)}.tag-grid{grid-template-columns:repeat(3,1fr)}.board-grid{grid-template-columns:repeat(2,1fr)}.feature-grid,.app-layout{grid-template-columns:1fr}.content-grid,.content-grid.three{grid-template-columns:1fr}.frames-grid{grid-template-columns:1fr}.three-paths{grid-template-columns:1fr}.footer-groups{grid-template-columns:repeat(2,1fr)}}
@media(max-width:700px){.shore-tabs{display:none}.page-main{padding-top:82px;padding-bottom:58px}.brand{min-width:0;max-width:40%}.brand span{font-size:17px}.catalog-btn{padding:0 14px}.app-link{padding:0 12px}.tag-grid{grid-template-columns:repeat(2,1fr)}.hero{padding-top:20px}.hero-image{max-height:300px}.search-layer{top:20px;left:8px;right:8px;bottom:auto;background:transparent;padding-top:62px}.search-card{background:var(--pale)}.search-card{width:calc(100% - 24px);max-height:calc(100vh - 90px);overflow:auto}.mobile-bottom{position:fixed;z-index:50;left:0;right:0;bottom:0;display:grid;grid-template-columns:repeat(5,1fr);min-height:50px;padding-bottom:env(safe-area-inset-bottom);background:#fff;border-top:1px solid var(--border)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;min-height:50px;font-size:13px;color:var(--dark)}.mobile-bottom a.is-active{background:var(--sea);color:#fff}.footer-wrap{padding-bottom:54px}.footer-groups{grid-template-columns:1fr 1fr}.section{padding:40px 0}.content-grid article{padding:18px}}
@media(max-width:420px){.wrap{width:calc(100% - 32px)}.step-grid{grid-template-columns:1fr}.board-grid{grid-template-columns:1fr}.tag-grid{grid-template-columns:1fr}.footer-groups{grid-template-columns:1fr}.catalog-btn{font-size:14px}.app-link{font-size:13px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
:focus-visible{outline:3px solid var(--bright);outline-offset:3px}