/* LINE logo — Boxicons 2.1.4 ไม่มี bxl-line จึงวาดด้วย SVG mask (รับสีจาก currentColor · สเกลตาม font-size)
   ใช้กับหน้าที่ไม่ได้โหลด admin.css/app.css/bizmgmt.css (เช่น login.php, POS billing) — คัดลอกกฎเดียวกับ admin.css */
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