:root{--bg:#F4FAFC;--deep:#FFFFFF;--sub:#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)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",Arial,sans-serif;line-height:1.78;overflow-x:hidden}body.locked{overflow:hidden}a{color:var(--dark);text-decoration:none}a:hover{color:var(--sea)}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid rgba(43,179,196,.35);outline-offset:2px}.shell{width:min(1180px,calc(100% - 32px));margin:0 auto}.site-top{position:fixed;top:0;left:0;right:0;z-index:50}.mist-line{height:20px;background:var(--dark);color:white;font-size:12px}.mist-line .shell{height:20px;display:flex;align-items:center;justify-content:space-between}.text-btn{border:0;background:transparent;color:white;padding:0 2px;cursor:pointer;font:inherit}.dock-bar{height:62px;background:white;border-bottom:1px solid var(--border)}.dock-inner{height:62px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:16px}.brand-link{display:flex;align-items:center;min-width:0;color:var(--title);font-size:18px}.brand-logo{display:block;max-width:190px;height:36px;object-fit:contain;object-position:left center}.drawer-button,.app-link{min-height:44px;border:1px solid var(--border);border-radius:12px;padding:9px 16px;background:white;color:var(--dark);font-weight:700;display:inline-flex;align-items:center;justify-content:center}.app-link{justify-self:end;background:linear-gradient(135deg,#2BB3C4 0%,#1A7F8F 55%,#0F5B68 100%);color:white;border:0}.app-link:hover{color:white;filter:brightness(.98)}.shell-tabs{height:42px;background:var(--pale);border-bottom:1px solid var(--border)}.tabs-inner{height:42px;display:flex;gap:6px;align-items:center}.tabs-inner a{padding:6px 12px;border-radius:8px;color:var(--dark);font-size:14px}.tabs-inner a.is-active{background:var(--sea);color:white}.site-main{padding-top:146px}.page-hero,.section-block,.card-grid,.article-wrap{width:min(1180px,calc(100% - 32px));margin:0 auto}.page-hero{padding:44px 0 28px}.eyebrow{color:var(--sea);font-weight:800;letter-spacing:.08em;font-size:13px}.page-hero h1{font-size:clamp(28px,4vw,32px);line-height:1.25;color:var(--title);margin:8px 0 14px}.lead{font-size:17px;color:var(--muted);max-width:820px}.hero-media,.image-slot{background:linear-gradient(180deg,#fff,var(--sub));border:1px solid var(--border);border-radius:18px;padding:16px;box-shadow:var(--shadow)}.hero-media{margin-bottom:26px;min-height:180px;display:flex;align-items:center;justify-content:center}.hero-media img{width:100%;max-height:300px;object-fit:contain}.content-image{display:block;width:100%;max-height:230px;object-fit:contain;object-position:center;background:#fff;border-radius:14px}.image-slot:empty{min-height:160px}.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}.button-primary,.button-secondary{min-height:44px;display:inline-flex;align-items:center;padding:10px 16px;border-radius:12px;font-weight:800}.button-primary{background:linear-gradient(135deg,#2BB3C4 0%,#1A7F8F 55%,#0F5B68 100%);color:#fff}.button-primary:hover{color:#fff}.button-secondary{background:#fff;color:var(--dark);border:1px solid var(--border)}.section-block{padding:34px 0}.section-block.alt{background:transparent}.section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:18px}.section-head h2{margin:0;color:var(--title);font-size:24px}.section-head p{margin:0;color:var(--muted);max-width:700px}.steps-grid,.pebble-grid,.info-grid,.two-grid,.three-grid,.four-grid{display:grid;gap:16px}.steps-grid,.four-grid,.pebble-grid{grid-template-columns:repeat(4,1fr)}.two-grid{grid-template-columns:repeat(2,1fr)}.three-grid{grid-template-columns:repeat(3,1fr)}.info-grid{grid-template-columns:repeat(3,1fr)}.card,.step,.article-card,.list-card,.faq-item{background:#fff;border:1px solid var(--border);border-radius:16px;padding:20px;box-shadow:var(--shadow)}.step:nth-child(odd){border-top:4px solid var(--bright)}.step:nth-child(even){border-top:4px solid var(--dark)}.card h3,.step h3,.article-card h2,.article-card h3,.list-card h2,.list-card h3{color:var(--title);margin-top:0}.card p,.step p{margin-bottom:10px}.number-list{display:grid;gap:12px;counter-reset:item}.number-row{display:grid;grid-template-columns:52px 1fr;gap:14px;background:#fff;border:1px solid var(--border);border-radius:14px;padding:16px}.number-row strong{font-size:24px;color:var(--sea)}.article-wrap{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:24px;padding-bottom:44px}.article-main{min-width:0}.article-main section{background:#fff;border:1px solid var(--border);border-radius:16px;padding:24px;margin-bottom:18px;box-shadow:var(--shadow)}.article-main h2{color:var(--title);font-size:22px;margin-top:0}.article-main h3{color:var(--title)}.article-main p{margin:0 0 14px}.article-main ul{padding-left:20px}.side-nav{position:sticky;top:170px;align-self:start;background:var(--pale);border:1px solid var(--border);border-radius:16px;padding:18px}.side-nav h2{font-size:18px;color:var(--title);margin-top:0}.side-nav a{display:block;padding:7px 0;border-bottom:1px solid var(--border)}.gallery-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.gallery-strip figure{margin:0;background:#fff;border:1px solid var(--border);border-radius:14px;padding:12px}.gallery-strip figcaption{font-size:14px;color:var(--muted);padding-top:10px}.app-showcase{display:grid;grid-template-columns:320px 1fr;gap:30px;align-items:center;background:#fff;border:1px solid var(--border);border-radius:18px;padding:26px;box-shadow:var(--shadow)}.app-visual{display:flex;justify-content:center;align-items:center;background:var(--sub);border-radius:16px;padding:18px;min-height:280px}.app-visual img{max-width:100%;max-height:420px;object-fit:contain}.app-icon{width:64px;height:64px;object-fit:contain;border-radius:14px}.faq-list{display:grid;gap:14px}.faq-item h2{font-size:19px;margin:0 0 8px;color:var(--title)}.site-footer{background:var(--title);color:#D4E8EC;padding:48px 0 76px;margin-top:40px}.footer-brand a{color:#D4E8EC}.footer-brand a:hover{color:white}.footer-mark{display:flex;align-items:center;gap:14px;margin-bottom:26px}.footer-logo{max-width:160px;height:32px;object-fit:contain;object-position:left center}.footer-mark strong{display:block;color:white;font-size:20px}.footer-mark span{font-size:12px;letter-spacing:.16em}.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}.footer-grid h2{font-size:15px;color:white;margin:0 0 10px}.footer-grid a{display:block;padding:3px 0;font-size:14px}.footer-note{border-top:1px solid rgba(255,255,255,.12);padding-top:20px;margin-top:26px}.copyright{font-size:13px;color:#9FC1C8}.overlay{position:fixed;inset:0;background:rgba(14,58,70,.42);z-index:80;opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.overlay.open{opacity:1;visibility:visible;pointer-events:auto}.tide-drawer{position:fixed;top:0;right:0;height:100vh;width:min(410px,86vw);background:var(--bg);z-index:90;transform:translateX(102%);visibility:hidden;pointer-events:none;transition:.25s ease;overflow:auto;padding:18px}.tide-drawer.open{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:14px}.drawer-brand{display:flex;align-items:center;gap:10px;color:var(--title);font-weight:800}.drawer-brand img{width:auto;height:30px;max-width:140px;object-fit:contain}.icon-button{min-height:44px;border:1px solid var(--border);background:white;border-radius:10px;padding:8px 12px;color:var(--dark);cursor:pointer}.drawer-cards{display:grid;gap:12px}.drawer-cards section{background:#fff;border:1px solid var(--border);border-radius:16px;padding:14px;box-shadow:var(--shadow)}.drawer-cards h2{font-size:15px;color:var(--sea);margin:0 0 8px}.drawer-cards a{display:block;padding:9px;border-radius:10px}.drawer-cards a:hover{background:var(--sub)}.drawer-cards b{display:block;color:var(--title)}.drawer-cards span{display:block;color:var(--muted);font-size:12px;line-height:1.55}.search-layer{position:fixed;left:0;right:0;top:82px;z-index:95;visibility:hidden;pointer-events:none;opacity:0;transition:.2s}.search-layer.open{visibility:visible;pointer-events:auto;opacity:1}.search-card{width:min(760px,calc(100% - 32px));margin:10px auto;background:white;border:1px solid var(--border);border-radius:16px;padding:18px;box-shadow:var(--shadow)}.search-head{display:flex;align-items:center;justify-content:space-between}.search-look{display:block;color:var(--muted);margin-top:14px}.search-look input{display:block;width:100%;margin-top:8px;min-height:46px;border:1px solid var(--border);border-radius:10px;padding:10px 12px;font:inherit;color:var(--text);background:var(--bg)}.preset-links{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}.preset-links a{background:var(--pale);color:var(--dark);padding:8px 12px;border-radius:9px}.mobile-nav{display:none}.note-box{background:var(--pale);color:var(--dark);border-left:4px solid var(--sea);padding:16px;border-radius:10px;margin:16px 0}.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0}.tag-row span{background:var(--pale);color:var(--dark);border-radius:8px;padding:5px 9px;font-size:13px}
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@media(max-width:640px){.shell{width:min(100% - 32px,1180px)}.shell-tabs{display:none}.site-main{padding-top:98px}.dock-inner{grid-template-columns:minmax(0,1fr) auto auto;gap:8px}.brand-logo{max-width:120px;height:30px}.brand-link strong{font-size:16px}.drawer-button,.app-link{padding:8px 10px;font-size:13px}.page-hero{padding-top:30px}.steps-grid,.pebble-grid,.four-grid,.three-grid,.two-grid,.info-grid,.gallery-strip,.footer-grid{grid-template-columns:1fr}.section-head{align-items:start;flex-direction:column}.article-main section{padding:19px}.site-footer{padding-bottom:104px}.mobile-nav{display:grid;grid-template-columns:repeat(5,1fr);position:fixed;left:0;right:0;bottom:0;z-index:60;background:white;border-top:1px solid var(--border);min-height:50px;padding-bottom:env(safe-area-inset-bottom)}.mobile-nav a{display:flex;align-items:center;justify-content:center;min-height:50px;font-size:13px;color:var(--dark)}.mobile-nav a.is-active{background:var(--sea);color:white}.search-card{background:var(--pale);margin-top:0}.search-layer{top:82px}.app-showcase{padding:18px}.hero-media{min-height:140px}}