:root{--bg:#D7E4E6;--bg2:#C4D4D6;--card:#F3F7F7;--soft:#E4EEEF;--ink:#1E2C2E;--text:#2A3A3C;--muted:#4A6064;--aux:#6A8084;--teal:#4A8A8C;--sand:#C4A070;--line:rgba(30,44,46,.14);--focus:rgba(74,138,140,.42);--shadow:0 12px 28px rgba(30,44,46,.08);--max:980px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:Arial,"Microsoft YaHei","PingFang SC",sans-serif;font-size:15px;line-height:1.7;overflow-x:hidden}a{color:inherit;text-decoration:none}button{font:inherit}.skip{position:fixed;left:12px;top:-80px;background:#fff;color:#111;padding:10px 14px;z-index:99}.skip:focus{top:8px}.topline{position:fixed;top:0;left:0;right:0;height:20px;background:var(--ink);color:var(--card);z-index:50;font-size:12px}.topline-inner,.head-inner{max-width:1180px;margin:auto;height:100%;display:flex;align-items:center;justify-content:space-between;padding:0 18px}.brand-mini{letter-spacing:.04em}.text-btn,.menu-btn,.close-btn{border:0;background:transparent;color:inherit;cursor:pointer}.text-btn{min-width:44px;height:20px}.site-head{position:fixed;top:20px;left:0;right:0;height:54px;background:var(--card);border-bottom:1px solid var(--line);z-index:49}.brand{display:flex;align-items:center;min-height:44px;font-size:16px;font-weight:700;color:var(--ink)}.logo{display:block;height:24px;max-width:150px;object-fit:contain;object-position:center}.head-actions{display:flex;align-items:center;gap:8px}.head-link,.menu-btn{min-height:44px;display:inline-flex;align-items:center;padding:0 12px;border-radius:8px}.head-link:hover,.menu-btn:hover{background:var(--soft)}.menu-btn{border:1px solid var(--line);color:var(--ink)}.side-nav{position:fixed;top:86px;left:max(12px,calc((100vw - 1180px)/2));width:104px;display:flex;flex-direction:column;z-index:10}.side-nav 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var(--line);border-radius:9px;padding:20px;box-shadow:var(--shadow)}.image-slot{height:168px;background:var(--bg2);border-radius:8px;display:flex;align-items:center;justify-content:center;margin-bottom:16px;overflow:hidden}.media-img{width:100%;height:100%;object-fit:contain;object-position:center}.marquee{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.marquee .item{background:var(--card);border-top:4px solid var(--teal);padding:18px;border-radius:8px;min-width:0}.insert-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.insert{background:var(--soft);border:1px solid var(--line);border-radius:8px;padding:18px;transform:rotate(-.15deg)}.cards-2{display:grid;grid-template-columns:1fr 1fr;gap:18px}.periods{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.periods>div{background:var(--card);border-left:4px solid var(--sand);padding:18px;border-radius:8px}.status-list{display:flex;flex-direction:column;gap:10px}.status-item{display:grid;grid-template-columns:130px 1fr;gap:16px;align-items:start}.tag{display:inline-block;padding:3px 9px;border-radius:999px;background:var(--soft);color:var(--ink);font-size:13px;border:1px solid var(--line)}.app-split{display:grid;grid-template-columns:1.2fr .8fr;gap:24px;align-items:center}.app-visual{height:320px;background:var(--bg2);border-radius:10px;display:flex;align-items:center;justify-content:center;overflow:hidden}.app-visual .media-img{max-height:320px}.app-icon{width:48px;height:48px;object-fit:contain;margin-bottom:12px}.faq-mini{display:grid;grid-template-columns:1fr 1fr;gap:14px}.faq-mini>div{background:var(--card);padding:16px;border-radius:8px;border:1px solid var(--line)}.page-head p{max-width:760px}.reading-columns{columns:2 320px;column-gap:28px}.reading-columns section{break-inside:avoid;background:var(--card);border:1px solid var(--line);padding:18px;margin:0 0 18px;border-radius:8px}.walk-strip{display:flex;gap:14px;overflow-x:auto;padding-bottom:6px;scroll-snap-type:x proximity}.walk-strip article{flex:0 0 min(340px,86vw);scroll-snap-align:start;background:var(--card);border:1px solid var(--line);border-radius:8px;padding:18px}.single-flow article,.terms section,.method article{background:var(--card);border:1px solid var(--line);padding:20px;border-radius:8px;margin-bottom:16px}.memo-list{display:grid;gap:12px}.memo-list article{background:var(--card);border-left:4px solid var(--teal);padding:18px 20px;border-radius:8px}.topic-list{display:grid;gap:12px}.topic-list article{display:grid;grid-template-columns:180px 1fr;background:var(--card);border:1px solid var(--line);border-radius:8px;padding:18px}.center-wrap{max-width:760px;margin:auto}.center-card{text-align:center}.center-card p{text-align:left}.terms section h2{border-bottom:1px solid var(--line);padding-bottom:10px}.faq-list 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@media (min-width:1120px){.page-shell{margin-left:calc((100vw - 980px)/2 + 54px);margin-right:auto}}
@media (max-width:760px){.topline-inner,.head-inner{padding:0 16px}.side-nav{display:none}.page-shell{padding:94px 16px 76px}.hero-index,.page-head{padding:20px}.micro-index{grid-template-columns:1fr 1fr}.paper-grid,.insert-grid,.cards-2,.periods,.app-split,.faq-mini,.topic-list article{grid-template-columns:1fr}.marquee{display:flex;overflow-x:auto}.marquee .item{flex:0 0 82vw}.status-item{grid-template-columns:1fr;gap:8px}.footer-grid{grid-template-columns:1fr 1fr}.mobile-bar{display:grid;grid-template-columns:repeat(4,1fr);position:fixed;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(--line);z-index:45}.mobile-bar a{display:flex;align-items:center;justify-content:center;min-height:48px;color:var(--ink)}.search-panel{top:0;left:0;right:0;bottom:0;width:100%;transform:translateY(-100%);background:var(--ink);color:var(--card);border-radius:0;padding:86px 20px 20px}.search-panel.show{transform:translateY(0)}.search-panel .close-btn{color:var(--card)}.search-panel strong{color:var(--card)}.search-links a{background:rgba(255,255,255,.08);color:var(--card);border-color:rgba(255,255,255,.15)}.menu-panel{left:6%;bottom:calc(58px + env(safe-area-inset-bottom));width:88%;max-width:none}.menu-groups{grid-template-columns:1fr 1fr}.reading-columns{columns:1}.site-footer{padding-bottom:92px}.app-visual{height:280px}.about-banner{height:180px}}
@media (max-width:420px){.head-link,.menu-btn{padding:0 9px}.footer-grid{grid-template-columns:1fr 1fr;gap:14px}.menu-groups{grid-template-columns:1fr}.micro-index{grid-template-columns:1fr 1fr}.page-shell{padding-left:16px;padding-right:16px}}