:root{
  --mist:#F4FAFC;--white:#FFFFFF;--soft:#E7F3F6;--ink:#0E3A46;--text:#24505A;--muted:#4A7380;--faint:#7A9AA4;
  --sea:#1A7F8F;--bright:#2BB3C4;--deep:#0F5B68;--pale:#D7EEF2;--line:rgba(26,127,143,.16);--shadow:0 14px 34px rgba(14,58,70,.08);
  --header-h:124px;--radius:16px;--shell:1180px;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--mist);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.78;overflow-x:hidden}body.ui-locked{overflow:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}.skip-link{position:fixed;top:-60px;left:16px;z-index:200;background:var(--deep);color:#fff;padding:10px 14px;border-radius:10px}.skip-link:focus{top:10px}.shell{width:min(calc(100% - 32px),var(--shell));margin:0 auto}.site-header{position:fixed;inset:0 0 auto;z-index:90}.mist-line{height:20px;background:var(--ink);color:#fff;font-size:12px}.mist-inner{height:20px;display:flex;align-items:center;justify-content:space-between}.mist-brand{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.mist-search{height:20px;border:0;background:transparent;color:#fff;padding:0 2px;cursor:pointer}.dock-bar{height:62px;background:#fff;border-bottom:1px solid var(--line)}.dock-inner{height:100%;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:16px}.dock-logo{justify-self:start;display:flex;align-items:center;min-height:44px;font-weight:800;color:var(--ink);letter-spacing:.02em}.dock-logo img{display:block;height:34px;max-width:220px;width:auto;object-fit:contain}.drawer-trigger,.app-link,.btn{min-height:44px;border-radius:12px;border:1px solid var(--line);display:inline-flex;align-items:center;justify-content:center;padding:0 18px;font-weight:700}.drawer-trigger{background:var(--soft);color:var(--deep);cursor:pointer}.app-link{justify-self:end;background:linear-gradient(135deg,#2BB3C4 0%,#1A7F8F 55%,#0F5B68 100%);color:#fff;border:0}.shell-tabs{height:42px;background:var(--pale);border-bottom:1px solid var(--line)}.tabs-inner{height:100%;display:flex;align-items:center;gap:8px;overflow:hidden}.tabs-inner a{padding:6px 12px;border-radius:8px;color:var(--deep);font-size:14px;white-space:nowrap}.tabs-inner a.active{background:var(--sea);color:#fff}.site-main{padding-top:calc(var(--header-h) + 28px);padding-bottom:36px}.hero,.page-hero{margin-bottom:28px}.hero-media,.media-slot{background:var(--soft);border:1px solid var(--line);border-radius:18px;overflow:hidden;display:flex;align-items:center;justify-content:center}.hero-media{min-height:190px;max-height:300px}.hero-media img{width:100%;height:100%;max-height:300px;object-fit:contain;object-position:center}.media-slot{min-height:180px}.media-slot img,.card-media img,.wide-media img{width:100%;height:100%;object-fit:contain;object-position:center}.hero-copy{padding:28px 0 8px}.eyebrow{display:inline-block;margin-bottom:8px;color:var(--sea);font-weight:800;letter-spacing:.08em;font-size:13px}.hero h1,.page-hero h1{margin:0 0 14px;color:var(--ink);font-size:clamp(28px,4vw,32px);line-height:1.3}.hero p,.page-hero p{max-width:820px;margin:0;color:var(--muted)}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:20px}.btn-primary{background:linear-gradient(135deg,#2BB3C4 0%,#1A7F8F 55%,#0F5B68 100%);color:#fff;border:0}.btn-secondary{background:#fff;color:var(--deep)}section.content-section{margin:28px auto;padding:28px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow)}.section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:20px}.section-head h2{margin:0;color:var(--ink);font-size:24px}.section-head p{margin:0;color:var(--muted);max-width:700px}.step-grid,.card-grid,.pebble-grid,.info-grid,.gallery-grid,.faq-grid{display:grid;gap:16px}.step-grid,.card-grid{grid-template-columns:repeat(4,1fr)}.pebble-grid{grid-template-columns:repeat(4,1fr)}.info-grid{grid-template-columns:repeat(3,1fr)}.gallery-grid{grid-template-columns:repeat(2,1fr)}.step-item,.card,.pebble,.info-card,.faq-item,.index-row,.note-row{border:1px solid var(--line);background:var(--mist);border-radius:14px;padding:18px}.step-item:nth-child(odd){border-left:5px solid var(--bright)}.step-item:nth-child(even){border-left:5px solid var(--deep)}.step-item strong,.card h3,.pebble h3,.info-card h3{color:var(--ink)}.step-item p,.card p,.pebble p,.info-card p{margin:8px 0 0}.text-link{display:inline-flex;margin-top:10px;color:var(--sea);font-weight:800}.card-media{height:200px;background:var(--soft);border-radius:12px;margin:-2px -2px 14px;display:flex;align-items:center;justify-content:center;overflow:hidden}.number-list{display:grid;gap:10px}.number-item{display:grid;grid-template-columns:52px 1fr;gap:16px;padding:16px 0;border-bottom:1px solid var(--line)}.number-item:last-child{border-bottom:0}.number{font-size:24px;font-weight:900;color:var(--sea)}.number-item h3{margin:0;color:var(--ink)}.number-item p{margin:4px 0 0}.wide-media{height:240px;background:var(--soft);border-radius:16px;display:flex;align-items:center;justify-content:center;overflow:hidden;margin-bottom:20px}.gallery-card{background:var(--mist);border:1px solid var(--line);border-radius:16px;padding:14px}.gallery-card .card-media{height:190px;margin:0 0 12px}.gallery-card h3{margin:0;color:var(--ink)}.prose{max-width:860px}.prose h2{color:var(--ink);font-size:22px;margin-top:28px}.prose h3{color:var(--ink);font-size:18px}.prose p{margin:12px 0}.aside-note{background:var(--soft);border-left:4px solid var(--sea);border-radius:12px;padding:16px 18px;margin:18px 0}.index-list{display:grid;gap:12px}.index-row{display:grid;grid-template-columns:minmax(120px,.35fr) 1fr;gap:20px}.index-row h3{margin:0;color:var(--ink)}.index-row p{margin:0}.article-grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:22px;align-items:start}.article-side{position:sticky;top:150px;background:var(--soft);border:1px solid var(--line);border-radius:16px;padding:18px}.article-side h2{font-size:18px;margin:0 0 10px;color:var(--ink)}.article-side a{display:block;padding:8px 0;color:var(--deep)}.faq-item h2{font-size:18px;margin:0 0 8px;color:var(--ink)}.faq-item p{margin:0}.site-footer{background:var(--ink);color:#D4E8EC;padding:38px 0 calc(34px + env(safe-area-inset-bottom))}.footer-top{display:grid;grid-template-columns:220px 1fr;gap:36px}.footer-brand{display:flex;align-items:center;gap:12px}.footer-brand img{height:34px;max-width:150px;object-fit:contain}.footer-brand strong,.footer-brand span{display:block}.footer-brand strong{color:#fff;font-size:20px}.footer-brand span{font-size:12px;letter-spacing:.12em}.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}.footer-grid h2{font-size:15px;color:#fff;margin:0 0 10px}.footer-grid a{display:block;color:#D4E8EC;padding:4px 0;font-size:14px}.footer-note{border-top:1px solid rgba(255,255,255,.12);margin-top:28px;padding-top:18px;font-size:13px;color:#B9D5DA}.tide-drawer{position:fixed;top:0;right:0;bottom:0;width:min(420px,86vw);background:var(--mist);z-index:120;transform:translateX(102%);visibility:hidden;pointer-events:none;transition:transform .25s ease,visibility .25s ease;padding:16px;overflow-y:auto;box-shadow:-20px 0 50px rgba(14,58,70,.18)}.tide-drawer.open{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}.drawer-brand{display:flex;align-items:center;gap:10px;color:var(--ink);font-weight:800}.drawer-brand img{height:30px;max-width:150px;object-fit:contain}.icon-close{width:44px;height:44px;border:1px solid var(--line);border-radius:12px;background:#fff;color:var(--deep);font-size:24px;cursor:pointer}.wave-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:14px;margin-bottom:12px;box-shadow:var(--shadow)}.wave-card h2{font-size:15px;color:var(--sea);margin:0 0 6px}.wave-card a{display:block;padding:10px;border-radius:10px}.wave-card a:hover,.wave-card a:focus-visible{background:var(--soft)}.wave-card strong,.wave-card span{display:block}.wave-card strong{color:var(--ink);font-size:15px}.wave-card span{color:var(--muted);font-size:12px;margin-top:2px}.search-panel{position:fixed;top:82px;left:0;right:0;z-index:115;visibility:hidden;pointer-events:none;transform:translateY(-14px);opacity:0;transition:.2s ease}.search-panel.open{visibility:visible;pointer-events:auto;transform:translateY(0);opacity:1}.search-card{width:min(calc(100% - 32px),760px);margin:0 auto;background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px;box-shadow:var(--shadow)}.search-head{display:flex;align-items:center;justify-content:space-between}.search-head h2{margin:0;color:var(--ink)}.search-card label{display:block;margin:14px 0 8px;color:var(--deep);font-weight:700}.search-card input{width:100%;height:48px;border:1px solid var(--line);border-radius:12px;padding:0 14px;background:var(--mist);color:var(--ink)}.search-links{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}.search-links a{min-height:44px;padding:10px 14px;border-radius:10px;background:var(--soft);color:var(--deep);font-weight:700}.search-tip{color:var(--faint);font-size:13px;margin:12px 0 0}.screen-mask{position:fixed;inset:0;background:rgba(14,58,70,.34);z-index:110;opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.screen-mask.open{opacity:1;visibility:visible;pointer-events:auto}.mobile-nav{display:none}.app-layout{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:30px;align-items:center}.app-visual{height:420px;background:var(--soft);border:1px solid var(--line);border-radius:18px;display:flex;align-items:center;justify-content:center}.app-visual img{width:100%;height:100%;object-fit:contain}.icon-line{display:flex;align-items:center;gap:14px;margin-bottom:14px}.icon-line img{width:64px;height:64px;object-fit:contain;border-radius:14px}.legal-list{counter-reset:item;display:grid;gap:14px}.legal-item{background:var(--mist);border:1px solid var(--line);border-radius:14px;padding:18px}.legal-item h2{margin:0 0 8px;color:var(--ink);font-size:20px}.legal-item p{margin:0}.focus-ring:focus-visible,a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid rgba(43,179,196,.38);outline-offset:2px}
@media (max-width:900px){.step-grid,.card-grid,.pebble-grid{grid-template-columns:repeat(2,1fr)}.info-grid{grid-template-columns:1fr 1fr}.footer-top{grid-template-columns:1fr}.article-grid,.app-layout{grid-template-columns:1fr}.article-side{position:static}.app-visual{max-width:420px;width:100%;margin:0 auto}.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){:root{--header-h:82px}.shell{width:min(calc(100% - 32px),var(--shell))}.shell-tabs{display:none}.site-main{padding-top:calc(var(--header-h) + 20px);padding-bottom:78px}.dock-inner{grid-template-columns:minmax(0,1fr) auto auto;gap:8px}.dock-logo{min-width:0}.dock-logo img{height:30px;max-width:120px}.drawer-trigger,.app-link{padding:0 12px;font-size:14px}.mist-brand{max-width:75vw}.hero-copy{padding-top:20px}.hero-media{min-height:150px}.content-section{padding:20px!important;margin:20px auto!important}.section-head{display:block}.section-head p{margin-top:6px}.step-grid,.card-grid,.pebble-grid,.info-grid,.gallery-grid,.faq-grid{grid-template-columns:1fr}.index-row{grid-template-columns:1fr;gap:6px}.footer-grid{grid-template-columns:repeat(2,1fr)}.search-panel{top:82px}.search-card{width:calc(100% - 20px);background:var(--soft)}.mobile-nav{position:fixed;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(--line);z-index:80;display:grid;grid-template-columns:repeat(5,1fr)}.mobile-nav a{display:flex;align-items:center;justify-content:center;min-height:50px;font-size:13px;color:var(--deep)}.mobile-nav a.active{background:var(--sea);color:#fff}.site-footer{padding-bottom:calc(80px + env(safe-area-inset-bottom))}.number-item{grid-template-columns:42px 1fr}.wide-media{height:200px}.card-media{height:190px}}