:root{--ink:#153f4a;--muted:#60767d;--paper:#fbf8f1;--line:rgba(21,63,74,.16);--coral:#e78a6d;--blue:#d9edf3}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);background:var(--paper);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;overflow-x:hidden}
a{color:inherit}.mobile-only{display:none}.preview-shell{width:min(1160px,calc(100% - 48px));margin:0 auto}
.preview-topbar{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;min-height:68px;padding:0 max(24px,calc((100% - 1160px)/2));border-bottom:1px solid var(--line);background:rgba(251,248,241,.94);backdrop-filter:blur(12px)}
.preview-brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-family:Georgia,"Songti SC",serif;font-size:20px;font-weight:700}.preview-brand i{width:13px;height:13px;border-radius:50%;background:#f1c95e;box-shadow:0 0 0 5px rgba(241,201,94,.2)}.preview-top-actions{display:flex;align-items:center;gap:12px}.home-link{text-underline-offset:4px;font-size:14px}.login-link{display:inline-flex;align-items:center;justify-content:center;min-height:40px;padding:0 17px;border-radius:999px;background:var(--ink);color:white;font-size:13px;font-weight:800;text-decoration:none}
.preview-hero{padding:70px 0 58px;background:linear-gradient(135deg,var(--blue),#edf5ed 52%,#fff0e4)}.preview-kicker{margin:0 0 16px;color:#4d7079;font-size:12px;font-weight:800;letter-spacing:.18em}.preview-hero h1{max-width:920px;margin:0;font-family:Georgia,"Songti SC",serif;font-size:clamp(54px,6vw,78px);font-weight:500;letter-spacing:-.055em;line-height:1.16}.preview-hero h1>span{display:block}.title-route b{font:inherit}.preview-note{max-width:650px;margin:22px 0 0;color:#4f6870;font-size:17px;line-height:1.8;word-break:break-all}
.preview-content{padding:74px 0 84px}.overview-label{display:flex;align-items:baseline;justify-content:space-between;gap:28px;margin-bottom:12px}.overview-label span{color:var(--coral);font-size:13px;font-weight:800;letter-spacing:.1em}.overview-label p{margin:0;color:var(--muted);font-size:14px;line-height:1.6;text-align:right;word-break:break-all}
.gate-overview{margin:0;padding:0;list-style:none;border-top:1px solid var(--line)}.gate-overview li{display:grid;grid-template-columns:88px 270px 18px minmax(0,1fr);gap:24px;align-items:center;padding:32px 12px;border-bottom:1px solid var(--line)}.gate-mark{display:grid;place-items:center;width:50px;height:50px;color:#a9a9a1;font-family:Georgia,"Songti SC",serif;font-size:42px;line-height:1}.mark-coordinate{font-size:36px}.mark-create{font-size:31px}.mark-echo{font-size:38px}.mark-grow{font-size:34px}.mark-integrate{font-size:39px}.gate-title small{display:block;color:var(--coral);font-size:14px;font-weight:800;letter-spacing:.08em}.gate-title h2{margin:5px 0 5px;font-family:Georgia,"Songti SC",serif;font-size:38px;font-weight:500;letter-spacing:-.04em}.gate-title p{margin:0;color:var(--muted);font-size:14px}.gate-overview i{display:block;width:8px;height:8px;border-radius:50%;background:#b8b5ad}.gate-description{display:grid;gap:10px}.gate-description p{margin:0;color:#4f6268;font-size:18px;line-height:1.62;word-break:keep-all}.gate-description strong{display:inline-block;min-width:126px;color:var(--ink);font-size:15px}
.preview-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:12px;margin-top:44px}.preview-actions a{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 22px;border-radius:999px;text-decoration:none;font-weight:800}.preview-actions .secondary{border:1px solid var(--line);background:white}.preview-actions .primary{background:var(--ink);color:white}footer{padding:24px;text-align:center;border-top:1px solid var(--line);color:var(--muted);font-size:13px}
@media(max-width:760px){.mobile-only{display:block}.preview-shell{width:calc(100% - 36px)}.preview-topbar{padding:0 18px}.home-link{display:none}.login-link{padding:0 13px;font-size:12px}.preview-hero{padding:54px 0 46px}.preview-hero h1{font-size:clamp(42px,11vw,50px);line-height:1.2}.title-route b{display:block}.preview-note{font-size:16px}.overview-label{display:block}.overview-label p{margin-top:7px;text-align:left}.gate-overview li{grid-template-columns:52px minmax(0,1fr);gap:8px 14px;padding:24px 2px}.gate-mark{grid-row:1/3;width:42px;height:42px;font-size:34px}.mark-coordinate{font-size:31px}.mark-create{font-size:27px}.mark-echo{font-size:34px}.mark-grow{font-size:29px}.mark-integrate{font-size:34px}.gate-title h2{font-size:30px}.gate-overview i{display:none}.gate-description{grid-column:2;gap:8px}.gate-description p{font-size:15px;line-height:1.7;word-break:normal}.gate-description strong{display:block;min-width:0;margin-bottom:1px;color:var(--coral);font-size:13px}.preview-actions{align-items:stretch;flex-direction:column;margin-top:36px}.preview-actions a{width:100%}}