:root{--mist:#F4FAFC;--white:#FFFFFF;--pale:#E7F3F6;--title:#0E3A46;--text:#24505A;--muted:#4A7380;--soft:#7A9AA4;--sea:#1A7F8F;--bright:#2BB3C4;--deep:#0F5B68;--light:#D7EEF2;--line: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(--mist);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.75;overflow-x:hidden}a{color:var(--deep);text-decoration:none}a:hover{text-decoration:none}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid rgba(43,179,196,.35);outline-offset:2px}button,input{font:inherit}.site-head{position:fixed;z-index:80;left:0;right:0;top:0}.mist-line{height:20px;background:var(--title);color:#fff;font-size:12px}.head-inner{width:min(var(--max),calc(100% - 32px));height:100%;margin:auto;display:flex;align-items:center;justify-content:space-between}.text-btn{border:0;background:transparent;color:#fff;padding:0 10px;min-height:20px;cursor:pointer}.dock-bar{height:62px;background:#fff;border-bottom:1px solid var(--line)}.dock-inner{display:grid;grid-template-columns:1fr auto 1fr;gap:16px}.brand-link{justify-self:start;display:flex;align-items:center;min-height:44px}.brand-logo{display:block;height:34px;max-width:180px;object-fit:contain;object-position:left center}.brand-fallback{font-weight:800;color:var(--title);font-size:20px}.window-btn{justify-self:center;min-height:44px;border:1px solid var(--line);background:var(--pale);color:var(--deep);border-radius:10px;padding:0 20px;cursor:pointer;font-weight:700}.app-link{justify-self:end;display:flex;align-items:center;min-height:44px;padding:0 15px;border-radius:10px;background:linear-gradient(135deg,#2BB3C4 0%,#1A7F8F 55%,#0F5B68 100%);color:#fff;font-weight:700}.shell-tabs{height:42px;background:var(--light);border-bottom:1px solid var(--line)}.tab-inner{justify-content:flex-start;gap:8px;overflow:hidden}.tab-inner a{display:flex;align-items:center;height:30px;padding:0 12px;border-radius:8px;color:var(--deep);font-size:14px;white-space:nowrap}.tab-inner a.active{background:var(--sea);color:#fff}.site-main{padding-top:148px;min-height:70vh}.wrap{width:min(var(--max),calc(100% - 32px));margin:0 auto}.page-hero{padding:28px 0 18px}.eyebrow{font-size:13px;color:var(--sea);font-weight:800;letter-spacing:.08em}.page-hero h1,.home-intro h1{margin:8px 0 12px;color:var(--title);font-size:clamp(28px,4vw,32px);line-height:1.35}.lead{max-width:860px;margin:0;color:var(--muted);font-size:17px}.image-slot{background:linear-gradient(180deg,#fff,var(--pale));border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);display:flex;align-items:center;justify-content:center;overflow:hidden}.image-slot img{display:block;width:100%;height:100%;object-fit:contain;object-position:center}.slot-title{color:var(--title);font-size:28px;font-weight:800;letter-spacing:.08em}.hero-image{max-height:300px;min-height:220px}.hero-image img{max-height:300px}.home-intro{padding:18px 0 34px}.home-intro p{max-width:860px}.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}.btn-primary,.btn-secondary{display:inline-flex;min-height:44px;align-items:center;justify-content:center;padding:0 18px;border-radius:10px;font-weight:800}.btn-primary{background:linear-gradient(135deg,#2BB3C4 0%,#1A7F8F 55%,#0F5B68 100%);color:#fff}.btn-secondary{background:#fff;color:var(--deep);border:1px solid var(--line)}.section{padding:38px 0}.section.alt{background:#fff}.section-head{display:flex;justify-content:space-between;gap:20px;align-items:end;margin-bottom:20px}.section-head h2{margin:0;color:var(--title);font-size:24px}.section-head p{margin:0;color:var(--muted);max-width:680px}.step-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.step-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px;box-shadow:var(--shadow)}.step-card.deep{background:var(--deep);color:#fff}.step-card.deep h3,.step-card.deep a{color:#fff}.step-card.bright{background:var(--bright);color:#fff}.step-card.bright h3,.step-card.bright a{color:#fff}.step-card h3{margin:0 0 7px;color:var(--title);font-size:18px}.step-card p{margin:0 0 10px;font-size:14px}.step-card a{font-weight:800}.number-list{counter-reset:item;display:grid;gap:12px}.number-item{display:grid;grid-template-columns:52px 1fr;gap:14px;background:#fff;border:1px solid var(--line);padding:16px;border-radius:14px}.number{font-weight:900;color:var(--sea);font-size:21px}.pebble-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.pebble{background:#fff;border:1px solid var(--line);border-radius:18px;padding:14px;box-shadow:var(--shadow)}.pebble .image-slot{height:200px;box-shadow:none;border-radius:12px}.pebble h3{color:var(--title);margin:14px 0 6px}.pebble p{margin:0}.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.feature{background:var(--pale);border:1px solid var(--line);border-radius:14px;padding:18px}.feature h3{margin:0 0 8px;color:var(--title)}.book-list{display:grid;gap:12px}.book-row{display:grid;grid-template-columns:140px 1fr;gap:18px;align-items:start;padding:18px;background:#fff;border:1px solid var(--line);border-radius:14px}.book-row strong{color:var(--title)}.gallery-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.gallery-item{background:#fff;border:1px solid var(--line);border-radius:16px;padding:14px}.gallery-item .image-slot{height:210px;box-shadow:none}.gallery-item h3{color:var(--title);margin:12px 0 4px}.app-panel{display:grid;grid-template-columns:minmax(240px,360px) 1fr;gap:32px;align-items:center}.app-panel .image-slot{height:420px}.icon-title{display:flex;align-items:center;gap:14px}.icon-title img{width:64px;height:64px;object-fit:contain}.content-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px;box-shadow:var(--shadow);margin-bottom:18px}.content-card h2,.content-card h3{color:var(--title);margin-top:0}.content-card p:last-child{margin-bottom:0}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:18px}.three-col{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.long-list{display:grid;gap:14px}.long-item{background:#fff;border-left:4px solid var(--sea);border-radius:0 14px 14px 0;padding:18px 20px}.long-item h2,.long-item h3{margin:0 0 8px;color:var(--title)}.chapter{padding:22px 0;border-bottom:1px solid var(--line)}.chapter:last-child{border-bottom:0}.chapter h2{color:var(--title);font-size:22px}.faq{display:grid;gap:14px}.faq article{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px}.faq h2{font-size:18px;color:var(--title);margin:0 0 8px}.faq p{margin:0}.meta-strip{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}.meta-strip a{background:var(--light);color:var(--deep);padding:8px 12px;border-radius:9px;font-weight:700}.site-footer{background:var(--title);color:#D4E8EC;margin-top:48px}.footer-inner{width:min(var(--max),calc(100% - 32px));margin:auto;padding:38px 0 28px}.footer-brand{display:flex;align-items:center;gap:14px;margin-bottom:28px}.footer-logo{height:34px;max-width:170px;object-fit:contain}.footer-brand div{display:flex;flex-direction:column}.footer-brand strong{color:#fff;font-size:20px}.footer-brand span{font-size:12px;letter-spacing:.16em}.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}.footer-grid h2{font-size:15px;color:#fff;margin:0 0 8px}.footer-grid a{display:block;color:#D4E8EC;padding:5px 0}.footer-note{border-top:1px solid rgba(255,255,255,.12);padding-top:20px;margin-top:24px}.copyright{color:#9FC1C8;font-size:13px}.overlay{position:fixed;inset:0;background:rgba(14,58,70,.35);z-index:90;opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.overlay.open{opacity:1;visibility:visible;pointer-events:auto}.tide-drawer{position:fixed;right:0;top:0;bottom:0;width:min(410px,86vw);background:var(--mist);z-index:100;transform:translateX(105%);visibility:hidden;pointer-events:none;transition:.25s ease;overflow-y:auto;padding:18px}.tide-drawer.open{transform:none;visibility:visible;pointer-events:auto}.drawer-head{display:flex;align-items:center;justify-content:space-between;position:sticky;top:-18px;background:var(--mist);padding:16px 0 12px;z-index:2}.drawer-brand{display:flex;align-items:center;gap:10px;color:var(--title)}.drawer-brand img{height:30px;max-width:130px;object-fit:contain}.close-btn{min-height:44px;padding:0 14px;border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--deep);cursor:pointer}.drawer-groups{display:grid;gap:14px}.drawer-groups section{background:#fff;border:1px solid var(--line);border-radius:16px;padding:14px;box-shadow:var(--shadow)}.drawer-groups h2{font-size:14px;color:var(--sea);margin:0 0 8px}.drawer-groups a{display:block;padding:9px 8px;border-radius:9px}.drawer-groups a:hover{background:var(--pale)}.drawer-groups b{display:block;color:var(--title)}.drawer-groups span{display:block;color:var(--muted);font-size:12px;line-height:1.55}.search-layer{position:fixed;top:82px;left:0;right:0;z-index:95;visibility:hidden;pointer-events:none;opacity:0;transform:translateY(-8px);transition:.2s}.search-layer.open{visibility:visible;pointer-events:auto;opacity:1;transform:none}.search-card{width:min(820px,calc(100% - 32px));margin:auto;background:#fff;border:1px solid var(--line);border-radius:0 0 16px 16px;box-shadow:var(--shadow);padding:20px}.search-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px;color:var(--title)}.search-card label{display:block;color:var(--muted);margin-bottom:6px}.search-card input{width:100%;min-height:48px;border:1px solid var(--line);border-radius:10px;padding:0 14px;background:var(--mist);color:var(--title)}.preset-links{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}.preset-links a{background:var(--light);padding:8px 12px;border-radius:9px;font-weight:700}.search-card p{font-size:13px;color:var(--soft);margin-bottom:0}.locked{overflow:hidden}.mobile-bottom{display:none}
@media(max-width:900px){.step-grid,.feature-grid,.pebble-grid{grid-template-columns:repeat(2,1fr)}.three-col{grid-template-columns:1fr}.app-panel{grid-template-columns:1fr}.app-panel .image-slot{height:360px}.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:700px){.site-main{padding-top:98px;padding-bottom:70px}.shell-tabs{display:none}.dock-inner{grid-template-columns:1fr auto 1fr;gap:6px}.brand-logo{height:28px;max-width:110px}.brand-fallback{font-size:17px}.window-btn{padding:0 10px;min-width:88px}.app-link{padding:0 10px;font-size:14px}.hero-image{min-height:160px}.section{padding:28px 0}.section-head{display:block}.section-head p{margin-top:6px}.step-grid,.feature-grid,.pebble-grid,.two-col,.gallery-grid{grid-template-columns:1fr}.pebble .image-slot{height:200px}.book-row{grid-template-columns:1fr}.app-panel .image-slot{height:360px}.footer-grid{grid-template-columns:1fr 1fr}.search-layer{top:82px}.search-card{width:calc(100% - 16px);background:var(--light);border-radius:0 0 14px 14px}.mobile-bottom{position:fixed;left:0;right:0;bottom:0;z-index:70;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(--line)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;min-height:50px;font-size:13px;color:var(--deep)}.mobile-bottom a.active{background:var(--sea);color:#fff}.site-footer{margin-bottom:0}.footer-inner{padding-bottom:80px}.page-hero{padding-top:20px}.mist-line .brand-mini{font-size:11px}}
@media(max-width:420px){.head-inner{width:calc(100% - 24px)}.window-btn{font-size:13px;min-width:80px}.app-link{font-size:13px}.footer-grid{grid-template-columns:1fr}.hero-image{min-height:145px}}