digraph G {
  graph [rankdir=LR, bgcolor="transparent", pad=0.15, nodesep=0.35, ranksep=0.65,
         fontname="Noto Sans CJK SC", fontsize=10];
  node [shape=box, style="rounded,filled", fontname="Noto Sans CJK SC", fontsize=10,
        color="#44546A", fillcolor="#F5F7FA", margin="0.13,0.08"];
  edge [fontname="Noto Sans CJK SC", fontsize=9, color="#596777", arrowsize=0.7];

  cpu [label="LoongArch32r CPU\n软件调度 / 校验", fillcolor="#EAF2F8"];
  xbar [label="AXI Crossbar\n双主设备 / 统一编址", fillcolor="#D9EAF7"];
  mem [label="BaseRAM / ExtRAM", fillcolor="#F2F2F2"];
  periph [label="UART / DVI / confreg", fillcolor="#F2F2F2"];
  dma [label="4 通道 DMA\nmem2mem / endpoint", fillcolor="#E8F3E8"];
  seq [label="matmul 批处理序列器", fillcolor="#E8F3E8"];
  matmul [label="4x4 矩阵乘法\n双 Bank + CRC", fillcolor="#FFF1D6"];
  fft [label="1024 点 FFT\n5 个 Radix-2² SDF 单元", fillcolor="#FFF1D6"];
  mlkem [label="ML-KEM-512/768/1024\nKeyGen / Encaps / Decaps", fillcolor="#F8E6EA"];

  cpu -> xbar [label="AXI master 0"];
  dma -> xbar [label="AXI master 1", dir=both];
  xbar -> mem [dir=both];
  xbar -> periph [dir=both];
  xbar -> dma [label="配置"];
  xbar -> matmul [label="Slave 7", dir=both];
  xbar -> fft [label="Slave 6 / 高地址", dir=both];
  xbar -> mlkem [label="Slave 6 / 低地址", dir=both];
  seq -> dma [label="描述符"];
  seq -> matmul [label="start / done"];
  dma -> matmul [label="本地 endpoint", dir=both, color="#2F6B3C", penwidth=1.4];
}