:root{--paper:#f4ead8;--paper2:#e5d4b7;--card:#fff7e9;--soft:#efe1ca;--ink:#19130b;--text:#302416;--muted:#675237;--gold:#805f24;--copper:#b98639;--line:rgba(25,19,11,.13);--strong:rgba(128,95,36,.48);--shadow:0 16px 34px rgba(25,19,11,.09)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-size:15px;line-height:1.72;overflow-x:hidden}body.locked{overflow:hidden}a{color:inherit;text-decoration:none}button{font:inherit}.wrap{width:min(960px,calc(100% - 32px));margin:0 auto}.slim{display:flex;justify-content:space-between;align-items:center}.top-strip{position:fixed;z-index:60;top:0;left:0;right:0;height:20px;background:var(--ink);color:var(--copper);font-size:12px}.text-trigger{border:0;background:none;color:var(--copper);padding:0 4px;height:20px;cursor:pointer}.main-head{position:fixed;z-index:59;top:20px;left:0;right:0;height:54px;background:rgba(255,247,233,.97);border-bottom:1px solid var(--strong);backdrop-filter:blur(12px)}.head-row{height:54px;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;min-height:44px}.logo-slot{height:28px;min-width:58px;display:flex;align-items:center}.logo-slot img,.footer-logo img,.drawer-logo img{max-height:24px;max-width:112px;object-fit:contain}.logo-slot b{font-size:18px;color:var(--ink)}.logo-slot img+b{display:none}.head-actions{display:flex;align-items:center;gap:8px}.app-link,.menu-btn{min-height:44px;padding:0 15px;border-radius:9px;display:inline-flex;align-items:center;justify-content:center}.app-link{border:1px solid var(--strong);color:var(--gold);background:var(--card)}.menu-btn{border:0;color:var(--card);background:linear-gradient(135deg,var(--ink),var(--copper));cursor:pointer}.dot-nav{position:fixed;z-index:58;top:74px;left:0;right:0;height:42px;background:rgba(255,247,233,.97);border-bottom:1px solid var(--line)}.dot-row{height:42px;display:flex;justify-content:center;gap:60px}.dot-item{position:relative;height:42px;min-width:70px;display:flex;flex-direction:column;align-items:center;justify-content:center;font-size:12px;color:var(--muted);line-height:1.05}.dot{width:8px;height:8px;border-radius:50%;border:1px solid var(--ink);margin-bottom:4px}.dot-item.active .dot{background:var(--copper);border-color:var(--copper)}.dot-item.active{color:var(--ink)}.site-main{padding-top:136px;padding-bottom:30px}h1,h2,h3,p{margin-top:0}h1{font-size:24px;line-height:1.3;color:var(--ink);margin-bottom:14px}h2{font-size:20px;line-height:1.4;color:var(--ink)}h3{font-size:16px;line-height:1.5;color:var(--ink)}.eyebrow{font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:var(--gold);font-weight:700}.lead{font-size:16px;color:var(--ink);max-width:760px}.muted{color:var(--muted)}.hero{padding:44px 0 28px}.hero-inner{background:var(--card);border:1px solid var(--line);border-top:3px solid var(--copper);border-radius:12px;padding:30px;box-shadow:var(--shadow)}.hero-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}.btn{min-height:42px;padding:0 18px;display:inline-flex;align-items:center;justify-content:center;border-radius:9px;font-size:14px}.btn.primary{background:linear-gradient(135deg,var(--ink),var(--copper));color:var(--card)}.btn.secondary{background:var(--card);border:1px solid var(--gold);color:var(--ink)}.btn:hover,.app-link:hover,.menu-btn:hover{transform:translateY(-1px)}a:focus-visible,button:focus-visible{outline:2px solid var(--copper);outline-offset:3px}.quick-index{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-bottom:22px}.quick-index a{border:1px solid var(--line);background:var(--soft);border-radius:10px;padding:12px;text-align:center;font-weight:700}.section{padding:28px 0}.section.alt{background:var(--paper2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.section-head{display:flex;justify-content:space-between;gap:20px;align-items:end;margin-bottom:18px}.section-head p{margin:0;max-width:560px;color:var(--muted)}.image-slot{display:flex;align-items:center;justify-content:center;background:var(--card);border:1px solid var(--line);border-radius:10px;overflow:hidden}.image-slot img{width:100%;height:100%;object-fit:contain;object-position:center}.wide-slot{height:168px}.banner-slot{height:200px}.portrait-slot{height:300px}.icon-slot{width:64px;height:64px}.triptych{display:grid;grid-template-columns:1.1fr .95fr .95fr;gap:14px}.card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:20px}.card .image-slot{margin-bottom:16px;height:154px}.split-pages{display:grid;grid-template-columns:1fr 1fr;gap:20px}.paper-note{background:var(--card);border:1px solid var(--line);border-left:4px solid var(--copper);border-radius:10px;padding:22px}.topic-pair{display:grid;grid-template-columns:1fr 1fr;gap:14px}.topic-card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:22px}.timeline{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.timeline article{background:var(--card);border-top:3px solid var(--copper);padding:20px;border-radius:9px;box-shadow:var(--shadow)}.status-list{display:grid;gap:10px}.status-item{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:15px 18px;display:grid;grid-template-columns:1fr auto;gap:18px;align-items:center}.status{font-size:12px;color:var(--gold);border:1px solid var(--strong);border-radius:999px;padding:5px 10px}.app-showcase{text-align:center}.app-visual{display:flex;gap:14px;justify-content:center;align-items:center;margin-bottom:22px}.app-visual .portrait-slot{width:min(100%,440px)}.app-copy{max-width:760px;margin:0 auto;text-align:left}.method-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.method-grid article{padding:20px;background:var(--card);border:1px solid var(--line);border-radius:10px}.list-stack{display:grid;gap:12px}.list-stack article{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:20px}.center-card{max-width:760px;margin:0 auto;text-align:center}.center-card .image-slot{margin:0 auto 20px}.terms{display:grid;gap:15px}.terms section{background:var(--card);padding:22px;border:1px solid var(--line);border-radius:10px}.faq-list{display:grid;gap:12px}.faq-item{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:20px}.faq-item h2{font-size:16px}.site-footer{background:var(--ink);color:var(--paper);border-top:1px solid var(--copper);padding:34px 0 80px}.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:24px}.footer-brand strong{display:block;font-size:20px}.footer-brand span{display:block;font-size:11px;color:var(--copper);letter-spacing:.18em}.footer-logo{min-width:40px;height:28px;display:flex;align-items:center}.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}.footer-grid h2{font-size:13px;color:var(--copper);margin-bottom:8px}.footer-grid a{display:block;font-size:13px;color:var(--paper);opacity:.9;padding:4px 0}.legal-note,.copyright{font-size:13px;color:#dac9ab;border-top:1px solid rgba(185,134,57,.25);padding-top:18px;margin-top:20px}.copyright{margin-top:10px;padding-top:10px}.overlay{position:fixed;z-index:80;inset:0;background:rgba(25,19,11,.42);opacity:0;pointer-events:none;transition:.18s}.overlay.show{opacity:1;pointer-events:auto}.drawer{position:fixed;z-index:90;left:18px;bottom:18px;width:240px;max-height:380px;background:var(--card);border:1px solid var(--strong);border-radius:12px;box-shadow:0 22px 60px rgba(25,19,11,.24);transform:translateY(calc(100% + 40px));opacity:0;visibility:hidden;pointer-events:none;transition:.22s;overflow:auto}.drawer.show{transform:translateY(0);opacity:1;visibility:visible;pointer-events:auto}.drawer-head{position:sticky;top:0;background:var(--card);display:flex;align-items:center;justify-content:space-between;padding:12px;border-bottom:1px solid var(--line)}.drawer-brand{display:flex;align-items:center;gap:8px}.drawer-logo{height:24px;display:flex;align-items:center}.drawer-head button,.search-head button{border:1px solid var(--line);background:var(--soft);border-radius:8px;min-height:38px;padding:0 11px;cursor:pointer}.drawer-groups{padding:4px 12px 12px}.drawer-groups section{padding:8px 0}.drawer-groups h2{font-size:12px;color:var(--gold);margin:0 0 5px}.drawer-groups a{display:block;padding:8px 0;border-top:1px solid rgba(25,19,11,.06)}.drawer-groups b{display:block;font-size:13px}.drawer-groups span{display:block;font-size:11px;color:var(--muted);line-height:1.45}.search-panel{position:fixed;z-index:91;top:74px;left:0;right:0;visibility:hidden;opacity:0;pointer-events:none;transition:.18s}.search-panel.show{visibility:visible;opacity:1;pointer-events:auto}.search-card{width:min(640px,calc(100% - 32px));margin:0 auto;background:var(--card);border:1px solid var(--strong);border-radius:0 0 12px 12px;box-shadow:var(--shadow);padding:18px}.search-head{display:flex;justify-content:space-between;gap:18px;align-items:center}.search-head strong{display:block;color:var(--ink)}.search-head span{font-size:12px;color:var(--muted)}.search-links{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:14px}.search-links a{background:var(--soft);border:1px solid var(--line);border-radius:8px;padding:10px;text-align:center}.mobile-bar{display:none}.prose{max-width:820px}.prose p{margin-bottom:16px}.visual-top{display:grid;gap:22px}.visual-top .image-slot{height:220px}.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.contact-grid article{background:var(--card);border:1px solid var(--line);padding:22px;border-radius:10px}
@media(max-width:720px){.dot-nav{display:none}.site-main{padding-top:94px;padding-bottom:64px}.hero{padding-top:26px}.hero-inner{padding:22px}.quick-index{grid-template-columns:repeat(2,1fr)}.section-head{display:block}.triptych,.split-pages,.topic-pair,.timeline,.method-grid,.contact-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.drawer{left:6%;width:88%;bottom:60px;max-height:74vh}.search-panel{top:0;bottom:0;background:var(--ink);padding:70px 16px 70px}.search-card{width:100%;background:var(--ink);color:var(--paper);border-color:var(--copper);border-radius:12px}.search-head strong,.search-head span{color:var(--paper)}.search-links{grid-template-columns:1fr 1fr}.search-links a{background:rgba(255,247,233,.08);border-color:rgba(185,134,57,.5);color:var(--copper)}.mobile-bar{position:fixed;z-index:70;left:0;right:0;bottom:0;height:calc(48px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:var(--card);border-top:1px solid var(--strong);display:grid;grid-template-columns:repeat(4,1fr)}.mobile-bar a{display:flex;align-items:center;justify-content:center;font-size:13px}.mobile-bar a.active{background:var(--copper);color:var(--ink);font-weight:700}.site-footer{padding-bottom:88px}.status-item{grid-template-columns:1fr}.head-actions{gap:4px}.app-link,.menu-btn{padding:0 11px}.wrap{width:min(100% - 32px,960px)}}