:root{color-scheme:light dark;--bg: #eee2cf;--bg-deep: #e2d2bb;--bg-soft: #f6ede0;--ink: #221813;--muted: #6d5b53;--panel: rgba(255, 250, 244, .84);--panel-strong: rgba(255, 247, 237, .94);--panel-soft: rgba(255, 255, 255, .64);--line: rgba(87, 56, 41, .12);--line-strong: rgba(132, 63, 37, .2);--accent: #b75a34;--accent-deep: #7f381d;--accent-soft: #e3b183;--teal: #246f69;--teal-soft: rgba(36, 111, 105, .14);--button-bg: linear-gradient(180deg, #d46e47, #9c4326);--button-text: #fff7f2;--shadow: 0 24px 72px rgba(75, 42, 24, .14), 0 10px 28px rgba(75, 42, 24, .08);--shadow-strong: 0 28px 90px rgba(75, 42, 24, .18), 0 14px 36px rgba(75, 42, 24, .12)}html[data-theme=dark]{--bg: #151214;--bg-deep: #1b1718;--bg-soft: #221d1d;--ink: #f3e8de;--muted: #c9b7ab;--panel: rgba(30, 25, 26, .84);--panel-strong: rgba(37, 30, 31, .94);--panel-soft: rgba(255, 255, 255, .08);--line: rgba(255, 232, 218, .12);--line-strong: rgba(255, 191, 156, .2);--accent: #f08a61;--accent-deep: #ffad84;--accent-soft: #8c5239;--teal: #72c8bf;--teal-soft: rgba(114, 200, 191, .12);--button-bg: linear-gradient(180deg, #ec8057, #b14e31);--button-text: #fff7f2;--shadow: 0 24px 72px rgba(0, 0, 0, .32), 0 10px 28px rgba(0, 0, 0, .2);--shadow-strong: 0 28px 90px rgba(0, 0, 0, .4), 0 14px 36px rgba(0, 0, 0, .26)}*{box-sizing:border-box}html,body{min-height:100%}body{margin:0;color:var(--ink);font-family:Inter,Yu Gothic UI,Hiragino Sans,sans-serif;background:radial-gradient(circle at top left,rgba(229,171,106,.28),transparent 24%),radial-gradient(circle at top right,rgba(36,111,105,.12),transparent 18%),linear-gradient(180deg,var(--bg-deep) 0%,var(--bg) 52%,var(--bg-soft) 100%)}a{color:inherit}button{font:inherit}.portal-shell{min-height:100vh}.portal-container{width:min(1180px,calc(100% - 32px));margin:0 auto;padding:34px 0 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span{color:var(--teal);font-size:.88rem;font-weight:700}.feature-link{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 20px;border-radius:999px;text-decoration:none;font-weight:700;transition:transform .16s ease,box-shadow .2s ease,border-color .2s ease}.feature-link:hover,.tool-card:hover{transform:translateY(-2px)}.feature-link-primary{color:var(--button-text);background:var(--button-bg);box-shadow:0 14px 30px #7f321733}.feature-link-secondary{border:1px solid var(--line-strong);background:var(--panel-soft);color:var(--ink)}.route-panel{padding:26px}.route-panel h2{font-size:clamp(1.7rem,3vw,2.5rem)}.route-list{display:grid;gap:12px}.tools-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.tool-card{display:grid;gap:16px;padding:22px;text-decoration:none;transition:transform .16s ease,box-shadow .2s ease,border-color .2s ease}.tool-card:before{content:"";position:absolute;inset:0 0 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