:root{--primary:#0b5d3b;--primary-light:#126b45;--cream:#f7f3e9;--accent:#f28c18;--text:#24342c;--muted:#6c776f;--card:#fff;--radius:18px;--shadow:0 8px 28px rgba(39,56,45,.09);font-family:"PingFang SC","Noto Sans CJK SC","Microsoft YaHei",system-ui,sans-serif;color:var(--text);background:var(--cream)}*{box-sizing:border-box}body{margin:0;background:var(--cream)}button,input,textarea,select{font:inherit}.guide-shell{width:min(100%,480px);margin:0 auto;background:#fbf9f3;min-height:100vh;box-shadow:0 0 50px rgba(28,54,40,.1)}.guide-hero{position:relative;min-height:230px;overflow:hidden;padding:30px 26px;color:#fff;background:#064d31}.guide-hero:after{content:"";position:absolute;inset:0;background:radial-gradient(circle at 20% 10%,rgba(32,128,81,.4),transparent 45%);pointer-events:none}.brand-lockup{position:relative;z-index:3;display:flex;align-items:center;gap:13px}.brand-lockup strong{display:block;font-size:34px;line-height:1.05;letter-spacing:.08em}.brand-lockup 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16px}.guide-content>h1{text-align:center;margin:0;color:var(--primary);font-size:30px;line-height:1.3;letter-spacing:.035em}.title-rule{display:block;width:38px;height:5px;border-radius:5px;background:var(--accent);margin:10px auto 18px}.preview-strip,.demo-warning{padding:12px 14px;border-radius:12px;margin-bottom:16px;text-align:center;font-size:13px;font-weight:700}.preview-strip{background:#e9efe8;color:var(--primary)}.demo-warning{display:flex;align-items:center;justify-content:center;gap:9px;background:var(--accent);color:#fff;font-size:14px}.demo-warning span{display:grid;place-items:center;width:24px;height:24px;background:white;color:var(--accent);border-radius:50%;font-size:16px}.video-card{position:relative;overflow:hidden;border-radius:16px;min-height:210px;background:#0d5137;box-shadow:var(--shadow);margin-bottom:14px}.video-card video{display:block;width:100%;height:230px;object-fit:cover;background:#0c4f36}.video-card:after{content:"";position:absolute;inset:0 40% 0 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